One exhibit showing the automatic opening of a door, controlled by a photoelectric cell. One exhibit showing the automatic opening of a door 1931-1933
Plaster model of a shire horse and harness (for model of a Sussex Wagon, 1931-526) Plaster model of a shire horse and harness
One model of early telephone switchboard. With this is 1915-222 - early telephone. One model of early telephone switchboard
Model to demonstrate Heat by Friction, consisting of Friction Wheel and Thermometer Model to demonstrate Heat by Friction
Motor car Jack, type XJ 87 with 14lb square weight Motor car Jack, type XJ 87 with 14lb square weight
"Experiments in a Vacuum" exhibit, with pump. (Pump purchased for #146.3.6 from the firm) "Experiments in a Vacuum" exhibit
Large 2-hour sand-glass by Henry Hughes & Son Ltd., Hainault, England, 1931 Large 2-hour sand-glass by Henry Hughes & Son Ltd. 1931
Full-sized model of a Hand holding a Torch (electrically illuminated) Full-sized model of a Hand holding a Torch (electrically illuminated)
Model illustrating use of modern Electrical Illumination:- "Studio" Model illustrating use of modern Electrical Illumination:- "Studio"
Demonstration model to illustrate the principle of the sundial Demonstration model to illustrate the principle of the sundial
Model Heliograph. (Background scene purchased from E.M. Dinkel for £5 in 1934). Model Heliograph. (Background scene purchased from E.M. Dinkel for �5 in 1934)