The Royal Gauger or, Gauging Made Perfectly Easy, As it is actually practised by the Officers of his Majesty's Revenue Of Excise. In Two Parts - Charles Leadbetter 1760 - C. Hitch and L. Hawes et al., London - Fifth Edition, very much enlarged and improved. A "gauger" was an officer whose business it was to ascertain the contents of casks, mainly to assist in the prevention of illicit shipments of alcohol. In addition to dealing with the ever present challenge of taxing producers of alcohol, he had to prove an accurate mathematical formula for ‘gauging’ the size of containers, mostly barrels. The complex calculations required the use of a slide rule, the three slide version of which is illustrated and described in detail within.

Special sections give advice on how to become an excise officer, and "cask-Gauging" as practised in the Port of London. The majority of this large and comprehensive work is directed at gauging of breweries, malt compounders and distilleries.

Illustrated with two large folding hand-coloured plates, five large folding monochrome plates, and two folding ‘vouchers’. All present and correct as per the binders instructions (due to the size of the second hand-coloured plate (Plate 1) it is sometimes rebound in two parts, and incorrectly collated as two separate plates, in the later seventh edition it was actually printed on two separate pages).
  Provenance: Thomas Shelding with his contemporary ownership inscription dated 1766, on which he has noted a price of seven shillings and sixpence. Later name of R. Butcher dated May 27th 1842. Also with more recent invoice for the purchase of this book by Tom Wyman in 1999 (with loose US$1,065 invoice inserted).

Octavo (binding size 21.3 x 13.5 cm), pp. [2] [2 (original endpapers bound in)]xvii [1 (Directions for binding)] 208, 209-218 (additional pages inserted at the end of part I and paginated in brackets), 209-474 [2] [2].

Collated (9/7/2018 lj) Large folding plates with colour outlines opposite title page (Plate A), and page 65 (Plate 1), large monochrome folding plates opposite pages 114 (Plate 2), 152 (Plate VI), 178 (Plate 3), [216] (Plate 4, and Plate 5), 227 (Ale and Beer Voucher), 229 (Malt Voucher). Correct as per binder’s instructions.
  In modern full brown calf, spine with red morocco label in gilt, twin fillet borders in blind to front and rear panel. intricate inner-dentelles in blind. Original endpapers bound in to front.   Condition: Very good to near fine, minor toning, small wormhole to outer edge from front to page 123, in fine binding.   Ref: 109487   Price: HK$ 6,500