Floating barograph used at Liverpool Observatory, 1862

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.

Liverpool-based engineer Alfred King designed this self-registering barometer, or barograph, which could inscribe a continuous record of atmospheric pressure onto a recording cylinder. While some self-registering instruments at the time used photographic recording mechanisms, King believed his design would be simpler to use, not requiring the skilled manipulation demanded by photographic instruments. The barometer tube was 'floated' in a mercury-containing cistern, and was designed to rise and fall as atmospheric pressure fluctuated. The instrument required over 80 lbs (36 kg) of mercury to operate.