Accession Number: 2012.ast.20


This instrument is a tall precision chronometer resembling a grandfather clock. The case is wood with a glass front door closed by two locks on the side. Inside the case, the clock instrument consists of a large white metal face which measure minutes. Two smaller dials on the inside of the larger minutes dial measure seconds and 24-hours. A pendulum consisting of two glass weights hangs from the clock mechanism that can be filled with liquid to increase their weight. A metal cord is attached to a small weight to a larger weight at the base of case. This mechanism powers the clock.

Alternative Name: astronomical chronometer

Primary Materials: wood, glass, metal

Markings: interior plaque – “Sidereal Time”

Dimensions (cm):

Height = 149 x Width =48.5 x Length 25.5

Function: For precision measurements of time.


good – there are some scratches, some paint splatter and there is slight corrosion on the clock face

Associated Instruments:


Date of Manufacture: c. 1900


University of Toronto Department of Astronomy

Donated to UTSIC: No

Historical Notes: