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three-nail microphone, 1875-1880

Telecommunications

1875-1880

Clockwork interruptor, once owned by David Hughes, 1875-1880

Radio Communication

1875-1880

Experimental microphone, 1878-1890

Telecommunications

1878-1890

replica of Bell's 1876 centennial telephone transmitter, 1959

Telecommunications

1959

Receiving ‘jigger’ used by the Marconi Company, 1898

Radio Communication

1898

Sinclair line selector automatic switch board, 1880-1890

Telecommunications

1880-1890

Experimental carbon pencil microphone, 1878-1890

Telecommunications

1878-1890

powdered graphite microphone, 1878-1890

Telecommunications

1878-1890

Powdered graphite microphone, 1878-1890

Telecommunications

1878-1890

Replica of Soemmerring's telegraph of 1809-12, 1964

Telecommunications

1964

aerial inductances, 1901

Radio Communication

1901

Galvanometer from prototype Cox selenium-cell magnifier equipment, 1910-1920

Telecommunications

1910-1920

Powdered graphite microphone, 1878-1890

Telecommunications

1878-1890

Experimental carbon block microphone, 1878-1890

Telecommunications

1878-1890

Granular microphone in bamboo tube, 1878-1890

Telecommunications

1878-1890

Cell used in interruptor circuit, 1875-1890

Telecommunications

1875-1890

Granular microphone in glass tube, 1878-1890

Telecommunications

1878-1890

Hertzian receiving resonator, 1890-1894

Radio Communication

1890-1894

Specimen of the first transatlantic telephone cable, deep sea type, 1956

Telecommunications

1956

Mirror galvanometer for the transatlantic telegraph, 1858

Electricity and Magnetism

1858

Experimental microphone using steel needles and gas carbon, 1878-1890

Telecommunications

1878-1890

Experimental microphones with carbon pencils and cups, 1878-1890

Telecommunications

1878-1890

filings coherer, small glass tube with bulb at one end and cap of red sealing wax at other end, 1898

Radio Communication

1898

Poured wax doll,with head turned to one side; inse

Materials Science Gallery

c. 1900

Filings coherer, glass tube bent into U-shape at one end with bulb to form side-pocket on mounting bracket with terminals, 1894-1904

Radio Communication

1894-1904

Filings coherer, glass tube capped at ends, 1894-1904

Radio Communication

1894-1904

De Forest syntoniser, 1902-1907

Radio Communication

1902-1907

Wax model of a plague scene, Europe, 1657

Classical & Medieval Medicine

1657

Three-wheeled motor car

Road Transport

1888

Half-penny surgically removed from child

Surgery

1914-1930

Cinchonine sulphate crystals, England, 1860-1910

Materia Medica & Pharmacology

1860-1910

Wax model of a female human head, Germany, 1801-1900

Anatomy & Pathology

1801-1900

One of a pair of home made Bell telephone receivers, probably made by David Edward Hughes, England, 1875-1890.

one of a pair of home made Bell telephone receivers, 1875-1890

Telecommunications

1875-1890

Experimental microphones using steel needles and gas carbon, 1878-1890

Telecommunications

1878-1890

Wax death mask of Benjamin Disraeli, England, 1881

Psychology, Psychiatry & Anthropometry

1881

One of a pair of home made Bell telephone receivers, probably made by David Edward Hughes, England, 1875-1890.

one of a pair of home made Bell telephone receivers, 1875-1890

Telecommunications

1875-1890

Seven 1/4 scale models of apparatus used by Heinrich Hertz, 1949

Radio Communication

1949

Experimental coherers designed or used by Sir Oliver Lodge, 1894-1904

Radio Communication

1894-1904

Portions of Ronalds' electrostatic telegraph, 1816

Telecommunications

1816

Coloured wax model of a male, half skeletal, half living and dressed in regency clothing, England, 1810-1850

Anatomy & Pathology

1810-1850

Three-foot length of telegraph cable for use in the Cooke and Wheatstone telegraph system, cased, unknown maker, England, 1837

Cooke and Wheatstone telegraph cable, 1837

Telecommunications

1837

Wax vanitas, Europe, 1701-1800

Anatomy & Pathology

1701-1800

Slide rule for interest calculations

Mathematics

1824

Experimental microphone in sound box, consisting of two small blocks of wood-charcoal pressed upon each other by a spring, probably made by David Hughes, England, 1878-1890

Experimental microphone in sound box, 1878-1890

Telecommunications

1878-1890

Receiving ‘jigger’ or oscillation transformer with single layer split secondary coil and superimposed moveable two-part primary coil, used by the Marconi Company, probably made by Marconi's Wireless Telegraphy Company, Chelmsford, Essex, England, 1899

Receiving ‘jigger’ used by the Marconi Company, 1899

Radio Communication

1899

Waxed post-mortem thread

Surgery

c.2016

Prototype Cox selenium-cell magnifier equipment, 1910-1920

Telecommunications

1910-1920

Wax anatomical model of human head

Anatomy & Pathology

1801-1900

Alarm clock, mounted on model of coffin

Anatomy & Pathology

1840-1900

Coloured wax model of a female, half skeletal, half living and dressed in regency clothing, England, 1810-1850

Anatomy & Pathology

1810-1850