Double balance pressure step valve, sectioned
One Ayrton-Perry voltmeter
Recording hair hygrometer
Stone 14 1/2 lbs Av. weight, for weighing chain and nailmaker's work
One Tucker hot-wire microphone
Latest type model of sunshine recorder
Aneroid Barometer, graduated in millibars, for use at sea
'Kombi' Early Miniature Camera
1895
Portable battery of 3 lead accumulator cells with reticulated grid plates
Bernay's Positive Water Meter
1895
Neck-forming tool, for Codd bottles
Solar microscope "O.N. Degerman. Fecit 1756"
Stone 1 lb 1 oz Av. weight, for weighing chain and nailmaker's work
Stone 5 lb 14 oz Av. weight, for weighing chain and nailmaker's work
Drawing of Edison's micro-tasimeter (infrared radiation detector)
1800-1899
One model of Dubbs oil cracking plant
Drawing of Edison's micro-tasimeter (infrared radiation detector)
1800-1899
Drawing of Ruben's linear thermopile
1800-1899
Sach's vegetation flask
Model of gas testing house
Christiansen liquid-filled glass optical filter
Two tools for withdrawing bore tubes
Two samples of bore tubes
Drawing of the magnetographs at the Kew Observatory
Map of World's earthquake areas
One drawing, 10" x 11". Diagram of optical system of sighting telescope for Machine Gun
Published chart - San Fernando and approaches
One police whistle
One set of four optical filters G.G.495 OR 2403
One 33 kV metal-clad switch-unit
Chart of spontaneous polarization
One Musgrave hot air coke-fired heating frame, c.1901
circa 1901
One drawing, 9 1/4"" x 14 1/2"
Transparency showing lens polishing machine
Diagram showing method of driving Dray Traverse Mark
Two maps, typical contiguous sheets of Desert Survey
One photographic enlargement
Photograph: Field work in Java
One deviation tube
Coloured diagram of hydrogen liquefier (Simon's design) in glazed mahogany frame
1900-1982