Compendium by Elias Allen
1630-1653
Wall telephone, 1880-1920
1880-1920
Brass earth arrester plates, 1900-1950
1900-1950
Two ivory slides, from Wilson screw barrel microscope
1710-1730
Crystal of mica in "book" form
Meteorograph, 1886-1903
1886-1903
Nose piece from nasal nitrous oxide apparatus
1871-1930
Portable universal equinoctial sundial, in brass,
1588
Pre-production model of a Howden HWP 300 Wind Turbine and Landrover
1980-1983
combined microscope-telescope with brass cap containing two ivory object plates
1822-1824
New Improved' universal compound microscope with fitted mahogany case
1785-1795
Optical cabinet or compendium in wooden mahogany case by Benjamin Martin
1765-1775
Cuff type (scroll foot) microscope by James Mann, c. 1755
1750-1760
Convection Mill Physics Apparatus, 1919-1928
1919-1928
Spark gap enclosed in wooden box
1885-1895
Milton Roy kidney machine used for home dialysis
1961-1971
KLG Ford spark plug made by Robinhood Engineering Works Ltd.
1920-1930
Crookes' Radiometer, 1872-1879
1872-1879
Crookes' Radiometer, 1877
1877
Crookes' Radiometer, 1877
1877
Model of Callendar's Sunshine Receiver, 19th Century
1895-1910
Callendar's Bolometer, 1914
1914
Azimuth compass
1840-1860
Dent's patent liquid compass with air chamber around rim
1860-1870
Half-penny surgically removed from child
1914-1930
Air Temperature Grid, 1902-1930
1902-1930
Air Temperature Grid, 1886-1930
1886-1930
Early Platinum Electrical Resistance Thermometer, 1871-1890
1871-1890
Early Platinum Electrical Resistance Thermometer, 1871-1890
1871-1890
Early Platinum Electrical Resistance Thermometer, 1871-1890
1871-1890
Photograph on Mica, Portrait of a Gentleman, c. 1855
1855
Marvin type kite meteorograph, by Schneider Brothers, USA, 1898
1898
Submarine projector liquid compass
1917-1924
Hedges's fusible cut-out with mica foil fuse
Two sheets of mica, approximately 10" x 6"
Toy polariscope
1828-1830
Frog's Heart Thermometer, 1887
1887
Crookes' Radiometer, 1878
1878
Callendar Electrical Temperature Indicator, 1894
1894
Gaede molecular vacuum pump
1910-1914
Screw-barrel MIcroscope by Edmund Culpeper, 1728-1730
1728-1730
Frequency indicator vibrating reed meter
1907-1917
Aluminium tube heater
1880-1920
Eloin Safety Lamp, 1846-1853
1846-1853
Crookes' Radiometer, 1872-1879
1872-1879
simple compass microscope with accessories: five objective lenses
1775-1785
Coronal Thermopile, used by Hugh Longbourne Callendar, 1905
1900-1905
Crookes' radiometer with four aluminium vanes coated on one side with clear mica (No. 4)
1878
Chetwynd liquid compass
1905-1912
High power water cooled transmitting valve, 1919-1925
1919-1925