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Callendar’s Drum Apparatus


A black wooden rectangular box with a label on top. Inside this box there is a thermometer with a scale going from 10 to 30 degrees Centigrade. The box also contains six 50 gram metal weights and 2 woven cords. At one end the 2 cords are attached together (approximately 39 cm long). At the other end there is a single cord approximately 41 cm long. One of the cords it is attached to a metal apparatus. The box also contains a hollow metal cylinder attached to a circular metal base (possibly a burner), a metal rod with double sided hooks, and a small metal pipe approximately 6 cm long.

Accession Number:

Alternative Name:

Mechanical Equivalent of Heat; Callendar’s Drum Apparatus

Primary Materials: Wood, metal, glass, fabric, woven cord


A black wooden rectangular box with a label on top reading “Mechanical Equivalent of Heat; Callendar’s Drum Apparatus”. The thermometer is labeled “Centigrade 4614012”, “English Made”, “CIC”

Dimensions (cm):

Height = 10.5, Width = 13, Length = 37.5


For determining the mechanical equivalent of heat. Transfers heat into mechanical energy, the quantity of which can be measured with 50 gram weights.


Associated Instruments:


Date of Manufacture:


Additional Information and References:

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