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Rocking microtome, Cambridge, England, 1885

1885

Einthoven 6-string galvanometer

1918

Twilight and afterglow effects at Chelsea

1888

Caldwell automatic microtome, Cambridge, England, 1884

1884

Electrocardiograph machine, about 1940

1935-1945

Angstrom pyrheliometer

1914

Cambridge Instrument Co. "Round Compensator", 1890

1890

Portable electrocardiograph, Cambridge, England, 1946

1946

Twilight and afterglow effects at Chelsea

1888

Kidney oncometer, 1877-1879.

1877-1879

Glazebrook's Calorimeter, 1890

1890

Measuring (travelling) microscope

1880-1900

Reading microscope with slide

1880-1885

Twilight and afterglow effects at Chelsea

1888

Twilight and afterglow effects at Chelsea

1888

A stromuhr for measuring blood flow, 1880-1881.

1880-1895

Callendar Electrical Temperature Indicator, 1894

1894

Micro-electroscope complete with stand

1904

Spheres from torsion balance

1889

Charles Vernon Boys' Gravitational Apparatus by the Cambridge Scientific Instrument Co., 1889

1889

Box for torsion balance components

1889

Charts from Boys' Torsion Balance

1889

Ewing duplex pendulum seismograph by Cambridge Scientific Instrument Co., 1886

Ewing duplex pendulum seismograph by Cambridge Scientific Instrument Co.

1886

Cambridge recording sound ranging apparatus

1918

Fitzgerald sine and tangent galvanometer

1887

Boys' torsion balance by Cambridge Scientific Instrument Co., 1889.

Boys' torsion balance and components

1889

Boy's apparatus for determining the mechanical equivalent of heat by The Cambridge Scientific Instrument Company, Cambridge, England, 1884. From The Physical Laboratory of the Science and Arts Department, South Kensington.

Boy's Mechanical Equivalent of Heat Apparatus, 1884

1884

Floating Zenith Telescope designed by Bryson Cookson, made by Cambridge Scientific Instrument Company with objectice lens by T. Cooke & Sons Ltd in 1900. Used at University of Cambridge, Observatories 1900-11 then the Royal Observatory, Greenwich 1911-51.

Floating Zenith Telescope designed by Bryson Cookson

1900

Circuit mirror and suspension for Boys radiomicrometer in small case; (quartz fibre suspension attached)

Circuit mirror and suspension for Boys radiomicrometer

1800-1899

Measuring equipment for Prof C.V. Boy's radiomicrometer, by Cambridge Scientific Instrument Co. , Cambridge, England, 1889-1893.

Prof C.V. Boy's radiomicrometer

1889-1893

Callendar & Griffiths self-testing resistance box and bridge

Callendar & Griffiths self-testing resistance box

1899

Measuring equipment for Prof C.V. Boy's radiomicrometer, by Cambridge Scientific Instrument Co. , Cambridge, England, 1889-1893.

Prof C.V. Boy's radiomicrometer

1889-1893

Boy's Radio-Micrometer with two suspensions (not seen) and cover, by The Cambridge Scientific Instrument Company, Cambridge, England, 1889-1893.

Boys' Radio-Micrometer, 1889-1893

1889-1893

Four silver cylinders from Boys' torsion balance, 1899.

Four silver cylinders from Boys' torsion balance

1889

Mahogany wooden box containing two large lead spheres from Boys' Torsion Balance gravitational apparatus, 1889

Lead Spheres for Charles Vernon Boys' Gravitational Equipment, 1889

1889

Ratio arm box, 5 ohms: 5 ohms, for use with Callendar and Griffiths bridge

Ratio arm box

1899

Ratio arm box, 50 ohms: 50 ohms, for use with Callendar and Griffiths bridge

Ratio arm box

1899

Prof C.V. Boy's radiomicrometer, made by The Cambridge Scientific Instrument Company, Cambridge 1889-1893.

Prof C.V. Boy's radiomicrometer

1889-1893

Combined thermoelectric-free key and commutator for use with Callendar and Griffiths bridge

Combined thermoelectric-free key and commutator

1900

Ratio arm box, 100 ohms: 100 ohms, for use with Callendar and Griffiths bridge

Ratio arm box

1899

Lamp and suspensions for Boy's radiomicrometer, by Cambridge Scientific Instrument Co. , Cambridge, England, 1889-1893.

Lamp and suspensions for Boy's radiomicrometer

1800-1899

Prof C.V. Boy's radiomicrometer, by Cambridge Scientific Instrument Co. , Cambridge, England, 1889-1893.

Prof C.V. Boy's radiomicrometer

1889-1893

Wooden base from Boys' Torsion Balance, 1889.

Wooden base from Boys' Torsion Balance

1889

Glass plate from Boys' from Boys' torsion balance, 1899.

Glass plate from Boys' torsion balance

1889

"Broca" galvanometer with one pair of coils of above 50 ohms resistance, extra pair of coils 4 ohms resistance, extra pair of coils 1600 ohms

"Broca" galvanometer with one pair of coils of above 50 ohms resistance

1906

Callendar & Griffiths self-testing resistance box and bridge

Callendar & Griffiths self-testing resistance box

1899