Wilson Cloud Chamber


Accession Number: 2009.ph.3


This instrument consists of a wooden base, to which the motor is attached. There are several parts attached to the base: Switch 1 (yellow), Switch 2 (wood and metal, No. 9.24), a variable resistor with two electric termini with a label “MOTOR”, and an unknown part consisting of a pump and cylinder containing a glass chamber at the top which is attached by screws. The motor is labeled “Direct current”, “No.: 34454, HP 1/8, Winding shunt, Volts 110, RPM 1800, Amp 1.4, Type D1/8”. The resistor has a label by “Zenith” and “1.2 Amps, Ohms 177”.

Alternative Name: Cloud chamber, Expansion cloud chamber

Primary Materials:

Glass, Metal, Plastic, Wood, Elastic and Leather bands


Old inventory number = “Phy 12”. The wooden base has a label by the Cambridge and Paul Co. Ltd. with serial number “016436”. The motor is labeled “Bodine Electric Co. Chicago, U.S.A.”. The unknown part has a label with serial number “C12666”, “The Cambridge and Paul Instrument Co. Ltd. London and Cambridge”. The number “650” is etched on the wood below the Cambridge and Paul label.

Dimensions (cm): Height = 24, Width = 30, Length = 86.5



Associated Instruments:

Manufacturer: Cambridge & Paul

Date of Manufacture: c. 1919-1924


Historical Notes: