Full Details

Name and Model Number	Bate
Country of Origin	United Kingdom
Date of Manufacture	circa 1820
Front Scales	slider 1: double-length log scales slider 2: scales relating to barrel volumes
Back Scales	Ruler measuring 24” in tenths of an inch
Scale Length	approx. 23”
Type of Rule	Slide Rule
Construction	Boxwood
Area of Use	Other
Comment	Probably used in the brewing industry for estimating the volume of the contents of a partially-filled barrel.
Rarity	RRRR
Donor	Collection of Trevor Catlow
Match Number	76
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RR	= Rare -- 1 of 25 collectors has one; it may take a year to find an example in the marketplace.
RRR	= Very rare -- only very few known to collectors; may take several years before one comes up for sale.
RRRR	= Extremely rare -- a museum piece; unlikely that an example will ever come up for sale.