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Date

Pregnancy testing kit

1980

Decade oscillator

1959

Siphon recorder

1955

Microfarad condenser

1906

Boxed tube of "Sarakan" toothpaste

1971-1975

D'Arsonval galvanometer no. 151667

1947

Servo Amplifier type D-614-D

1960

'Tox HA test' blood testing kit, London, England, 1979

1979

Bottle of tetanus vaccine, 1941.

1941-1943

Wheel or steel-disc coherer (thin-film detector), 1902

1902

Decade oscillator

1958

Oscillator, R.C., type D-330-B no. 163004

1949

Coupled phonic motors

MRC EPU, part of Dr. Richard Sloan's Zero Gradient Aural Thermometer system

1975-1985

Heurtley magnifier, 1919.

1919

Variable condenser

1948

Phasemeter power supply unit type D729-BS no. 297307

1957
Muirhead-Belin portable picture transmitter scanning unit with phone attachment and two-piece carry case, type D-368-AM, no. 144985 M, Muirhead and Coompany Limited, Beckenham, 1948

Muirhead-Belin portable picture transmitter scanning unit, 1948

1948
pH meter type D-303-B with spare dip electrode made by Muirhead and Co. Ltd., Beckenham, Kent, 1940-1950

pH meter type D-303-B with spare dip electrode made by Muirhead and Co. Ltd.

1940-1950
Frequency analyser type D-669-A No.255341 by Muirhead and Co Ltd, 30Hz to 30kHz in six ranges

Frequency analyser type D-669-A No.255341 by Muirhead and Co Ltd

1960-1969
Weston standard cell type D-402-A serial no.154508, by Muirhead and Co. Ltd.

Weston standard cell type D-402-A serial no.154508

1950
Standard resistance type D-558-C, 2 Megohm +- 0.5%, by Muirhead and Co. Ltd., Beckenham, Kent, no.179031

Standard resistance type D-558-C

1950
Muirhead-Wigan Decade Oscillator, Type D-890-A, by Muirhead &Co. Ltd., serial no. 416080, French patent no. 873458, range up to 11,111 Hz, c. 1980.

Muirhead-Wigan Decade Oscillator

1964
Muirhead-Pametrada Wave Analyser type D-489-GM, serial no.349364 in fitted wooden case, plus Supply Unit type D-489-GS serial no.347228 also in fitted wooden case, plus the following accessories (stored in the base of the power supply case): headphones, connecting cable, mains lead (without plug) and input lead, made by Muirhead & Co Ltd in about 1960

Muirhead-Pametrada Wave Analyser type D-489-GM

1960-1964
Weston standard cell type D-550-A, serial no.310439, by Muirhead

Weston standard cell type D-550-A

1960
Temperature-controlled precision standard cell type K-231-A serial no.416723, by Muirhead and Co. Ltd., Beckenham, Kent, England (with heavy metal base)

Temperature-controlled precision standard cell type K-231-A serial no.416723

1965
Tin of John Bell's toothpowder, by John Bell, Hills and Lucas Ltd. London, 1930-1960

Tin of John Bell's toothpowder, c 1930-1960.

1930-1960
Enlarger, type D-496-A no. 163417 by Muirhead and Co. Ltd., January 1949 with stand, 6-piece spare plate holder, focussing screen, 10 masks and one red filter

Enlarger, type D-496-A no. 163417 by Muirhead and Co. Ltd.

1949
Transcutaneous Aortic Velograph, model TAV 1006, designed by Henry H Light, manufactured by Muirhead Medical Ltd, Kent, 1974

Transcutaneous Aortic Velograph

1974