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Gas burette, Hempel type, late 19th century

Gas burette, Hempel type, late 19th century

Winkler's gas burette.

Winkler's gas burette.

Gas Burette for Hempel's Gas Pipette

Gas Burette for Hempel's Gas Pipette

Hempel explosion pipette for use with water, with burette and pressure tube, (added in 1904)

Hempel explosion pipette for use with water

Hempel's gas-pipette fitted with burette and pressure tube.

Hempel's gas-pipette

Bunte gas burette for the analysis of furnace gases.

Bunte gas burette for the analysis of furnace gases