Antique Boxwood HARROW MARK REDUCER British Made 36 Slide Rule Spirits Gauge. From the Museum of Applied Arts & Science. Over the 19th and much of the 20th centuries the slide rule was the primary instrument for calculation used by many people engaged in the trades and in engineering. Although originally invented in the 17th century, and widely used for gauging (or estimating the quantities of certain products such as alcoholic spirits) it took until around 1850 for the slide rule to become generally popular.
However for those engaged in estimating (ie, gauging) various quantities of goods in use in the liquor, building and agriculture trades, and for calculating the excise duty to be paid on these goods, numerous kinds of sliding rules with useful scales were developed. Damage at either end of slide does not affect smooth movement. The item "Antique Boxwood HARROW MARK REDUCER British Made 36 Slide Rule Spirits Gauge" is in sale since Sunday, November 25, 2018.This item is in the category "Collectibles\Tools, Hardware & Locks\Tools\Carpentry, Woodworking\Rules, Tapes". The seller is "bluebird1818" and is located in Hampstead, Maryland. This item can be shipped worldwide.