A sure guide to distillers, and all dealers in spiritous liquors, for discovering the true proportion of water and alchohol [sic] in any ... compound; and how to make it exactly proof, by a new-constructed hydrometer / [Benjamin Martin].

  • Martin, Benjamin, 1705-1782
Date:
[1759]
Catalogue details

Licence: Public Domain Mark

Credit: A sure guide to distillers, and all dealers in spiritous liquors, for discovering the true proportion of water and alchohol [sic] in any ... compound; and how to make it exactly proof, by a new-constructed hydrometer / [Benjamin Martin]. Source: Wellcome Collection.

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    PREFACE. IT muft be allowed that equal Weights of Water and Spirit, or Alcbohol, mixed to¬ gether, maize the only true and juft Proof, becaufe in that Cafe only the Quantity of Mat¬ ter in each can be equal. And if the fpecific Gravity of Water and Spirit be taken in fitch Proportion as I have herejuppojed to be the be ft, then this Hydrometer I prefume, is con- fir udled geometrically and phy/ically exact 5 and I maize no doubt of its being the fir ft that ever was Jo. For fitch an Inftrument can never be true if it be-not coriftrtitled by the Rules of Algebra, and by an hydroftatic Theory nicely corredlui by Experiments, They who make Hydrometers without thefe Principles may be juftly fa id (operose nihil agere,) to take great Pains to no Purpofe, unlefs to deceive themfelves and the Public; and thd this Invention may feem no great Matter, I can a Jure the Reader it has coft me more Time, Trouble, and Expence than any Inftrument I have ever yet made public. The Ufe of it may be greatly extended5 but I have accommodated it at prelent only to the Service of the Diftiller and Compounder, a 2 to