Wellington exposure meter, plastic disc mounted on card by metal rivet. In cloth envelope. Made by Wellington & Ward Ltd., Elstree, Herts. Wellington exposure meter
Two boxes containing six packets each of universal developer powder sealed in lead foil. For plates films and papers. Wellington and Ward Ltd. Wellington Universal Developer
Wellington exposure meter, made by Wellington and Ward. Extinction type, card carrying disc with 13 apertures before blue filtered viewing hole. For antiscreen plate. (M1569) Wellington exposure meter
Dial calculator exposure meter incorporating filtered extinction device. Calibrated for Anti screen plate, f/4-32, 1/1000sec to 16 secs. Wellington and Ward Ltd. Wellington exposure meter
Wellington exposure disc. Book type exposure calculator with exposure disc. Scales for: light Values 3/4-24; weather conditions sunshine-very dull; H & D speeds 6-400; subjects clouds - very dark interiors; apertures f/5.6-64; shutter speeds 3 hours - 1/350 sec. Manufactured by Wellington and Ward, Elstree, Herts. Wellington exposure disc calculator 1910
Human plasma protein solution in bottle supplied by the Lister Institute on behalf of the Ministry of Health Human plasma protein solution in bottle, Hertfordshire, England,1960-1967 1960-1967
Human albumin solution in unopened bottle, prepared for the Royal Navy by the Lister Institute, Elstree, c.1967 Bottle of albumin solution circa 1967
Box containing 2 sheets of Dufaycolor flat film tungsten type 41/4 in x 3 1/4 in. Dufaycolor Flat Film 1936