Walker’s Ship’s Log ‘Cherub’ Mark II

Pine case. 2 impellers

Type of object:

Other instruments

Time period:

Britain rules the waves + France

Place:

Birmingham

Date:

1900

Maker / Author:

Thomas Walker

Publisher / Printer:

Dimensions:

Material:

brass and glass in box with two impellers or spinners

Graduation:

Inscription:

Provenance:

References:

http://loch.fr/loch.fr/Walker.html

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Description

The log was used to record a ship's speed. This device would have a line and 'fish' or spinner attached to the rear. The spinner was then cast into the sea, and as it turned in the ship's wake, the revolutions were counted by the mechanical log to record the distance travelled and the speed.
This type was also used on the trainingship Mercator.