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Double balance pressure step valve, sectioned

Recording hair hygrometer

Aneroid Barometer, graduated in millibars, for use at sea

One Tucker hot-wire microphone

One Ayrton-Perry voltmeter

Latest type model of sunshine recorder

Portable battery of 3 lead accumulator cells with reticulated grid plates

Stone 14 1/2 lbs Av. weight, for weighing chain and nailmaker's work

One sectioned 2 HP induction motor with cast aluminium squirrel cage motor

'Kombi' Early Miniature Camera

1895

Neck-forming tool, for Codd bottles

Stone 5 lb 14 oz Av. weight, for weighing chain and nailmaker's work

Stone 1 lb 1 oz Av. weight, for weighing chain and nailmaker's work

Solar microscope "O.N. Degerman. Fecit 1756"

One police whistle, withdrawn from use by the Cornish Constabulary in 1970.

One police whistle

Framed and glazed coloured drawing:- Engineer's Precise Level.

Framed and glazed coloured drawing:- Engineer's Precise Level

Reproduction in colour of map of mining district in Eastern Desert of Egypt. (Book Plate).

Reproduction in colour of map of mining district in Eastern Desert of Egypt. (Book Plate)

Map of World's earthquake areas.

Map of World's earthquake areas

Two log glasses. One 15 minute glass. One 14 second glass.

Two log glasses

Two tracings on waxed cloth showing 'Outline Sheer Drawing' and 'Outline Plan of Hold for Navigating Officer', scale 1/4" = one foot, of H.M. Cruiser "Calliope" (1884), both stamped by the Chief Constructor at Portmouth Yard H.E. Deadman in 1892 and corrected by a later Chief Constructor by W. A Hopkins on October 27 1902.

Two tracings on waxed cloth, of the HMS Calliope (1884)

1892-1902

Cross-section drawing of an Electrolux Cooling System Unit, by the Science Museum, 1954.

Drawing of Electrolux Cooling System, 1954

1954

One busbar selector switch, size 3' x 1' 6" x 1' maximum depth, by Clarke-Chapman, c.1890.

One busbar selector switch

Model of Gravity Survey at Hodbarrow, Cumberland.

Model of Gravity Survey at Hodbarrow

Chart of spontaneous polarization.

Chart of spontaneous polarization

Two maps, typical contiguous sheets of Desert Survey, scale 1:100,000.

Two maps, typical contiguous sheets of Desert Survey

One small, rough, round, lead weight, about 1 lb Av. used for weighing chain and nailmaker's work in South Staffordshire.

One small, rough

One 132 kV condenser type outdoor bushing with mounting tank.

One 132 kV condenser type outdoor bushing with mounting tank

Diagram: Apparatus for geothermic investigation.

Diagram: Apparatus for geothermic investigation

Bates machine for engraving in imitation of medals, sculptures etc.

Bates machine for engraving

Five small drawings on one sheet - Types of Seismograph Pendulums.

Five small drawings on one sheet - Types of Seismograph Pendulums

Three fuse-type valves, C.V.123, including one with envelope removed.

Three fuse-type valves

Photograph: Salt ridge at Beuthe, near Hannover.

Photograph: Salt ridge at Beuthe

Diagram showing relative velocities of propagation & displacements due to Longitudinal, Transverse & Rayleigh Waves.

Diagram showing relative velocities of propagation & displacements due to Longitudinal

Photographs, mounted on one card, of Karcher Geophone Equipment. (Originals lent by Dr. D.C. Barton).

Photographs, mounted on one card

One exhibit showing an artificial rainbow. Label reads 'Newton & Co Scientific Instrument Makers to H.M. The King 72 Wigmore St London W'.

exhibit showing an artificial rainbow.

Diagram showing method of location of seismic receiving stations.

Diagram showing method of location of seismic receiving stations

One exhibit illustrating the reflection of light. Consisting of darkened case containing a number of mirrors, lenses, and one prism, showing the tracks of beams of light on reflection.

One exhibit illustrating the reflection of light

One exhibit showing interference and diffraction of light, containing:- Young's interference fringes. Fresnel's interference fringes. Diffraction at a straight edge. Diffraction by a solid obstacle. Consisting of 2 optical benches and 8 sliding stands, 2 metal test objects, 1 photographic object, 1 Fresnel biprism, 4 convex lenses 38mm diameter 120. dioptres.

One exhibit showing interference and diffraction of light

One ultra violet spectroscope.

One ultra violet spectroscope

Photograph: Field work in Java.

Photograph: Field work in Java

Printed card prospectus of lectures by Dalton, Dave and Allen at the Royal Institution, 1804.

Printed card prospectus of lectures by Dalton

One photographic enlargement, 5'6" x 3'6", aerial view of South Kensington Museum. March 1951.

One photographic enlargement

One Siemens Hygroscopic (N-H or "Putty" cable); low voltage cable with a loaded wax dielectric (1894).

One Siemens Hygroscopic (N-H or "Putty" cable)

Three mounted photographs, each 15" x 20", of cosmic ray apparatus as carried in satellite "Ariel". ex "First British Satellite - U.K.1" exhibition.

Three mounted photographs

Reduced copy in colour of Erbsdorf World Map. (Bookplate).

Reduced copy in colour of Erbsdorf World Map. (Bookplate)

Mason's plumb bob & line.

Mason's plumb bob & line.

One panel exhibit: Illuminated diagram of the manufacture of coal gas and its by-products.

One panel exhibit: Illuminated diagram of the manufacture of coal gas and its by-products

Coloured lithograph of Dempster-Toogood continuous vertical retort.

Coloured lithograph of Dempster-Toogood continuous vertical retort

One deviation tube.

One deviation tube

One vane tube

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