Microscope fitted with special cell containing heater/thermocouple for viewing mineral samples at very high temperatures, with power control unit, potentiometer plus standard cell and galvanometer for measuring thermocouple temperature, and other small accessories and spares
`London' polarising binocular microscope Model 6000 Serial Number 39454 by R. & J. Beck Ltd., London, fitted with graduated revolving stage, substage, substage condenser, 10X Beck objective, two 10X eyepieces, without foot but on special horizontal stand with electric lamp, and with special high temperature cell with heater/thermocouple for examining mineral samples at high temperatures
Power and control unit for supplying heating current to high temperature cell on microscope, and for measuring sample temperature approximately
Universal Precision Potentiometer Cat. No.7565 Serial Number 58677. Made in England by W G Pye & Co Ltd., Cambridge, range 0 to 1.75 volts with X1, X0.1 and X0.01 range multipliers, probable date 1963 (used for measuring temperature of thermocouple in high temperature microscope cell)
Cadmium (Weston) standard cell, 1.0186 volts at 20 degree C, Serial Number 32610, made in England by W G Pye & Co Ltd, Cambridge (used with Pye potentiometer for measuring temperature of thermocouple in high temperature microscope cell)
`Scalamp' moving coil reflecting galvanometer with built-in lamp and scale, Cat. No.7903' s, made by W G Pye & Co Ltd., Cambridge, England (used with Pye potentiometer for measuring temperature of thermocouple in high temperature microscope cell)
Accessories and spares for high temperature microscope comprising high temperature cells, carriers fitted with thermocouples, and guillotine for shaping and cutting thermocouples
