End plate assembly for a battery of mercury delay tubes from EDSAC 1, 1946-1958 Computing & Data Processing 1946-1948
Passive component plate, type A3, for Sargrove sprayed-circuit radio receiver, 1936-1948 Electronic Components 1936-1948
active 1921-1947, publisher of psychological assessments, American The Psychological Corporation 1921
Main portion of short mercury delay tube from the electronic computer EDSAC, 1946-1958 Computing & Data Processing 1946-1958
Section of miniature hospital including entrance and staircase Nursing & Hospital Furnishings 1930-1932
Puzzle in the form of a maze showing the path from 'Slumdon' to 'Good Health' Nursing & Hospital Furnishings 1930-1939
'Tabloid' medicine chest, used for 1938 Mt. Everest expedition Materia Medica & Pharmacology 1937-1938
Model of open oscillator with spherical radiators used by Heinrich Hertz, 1949 Radio Communication 1949