Declaration De L'usage Du Graphometre. - Traicte De L'usage Du Trigometre

8vo., (7 1/8 x 4 6/8 inches). 14 fine copper-engraved plates, including two duplicates, four woodcut illustrations, including two full-page (pale waterstains throughout). 18th-century speckled calf gilt (hinges weak, extremities scuffed). First edition, with the second state of the privilege leaf, with lines 6, 9 and 10 ending "toutes", "pareil", and "sans que". Describing Danfire's ingenious invention of an instrument used by surveyors to measure angles, which remianed popular with a few modifications well into the 19th-century. A fine metal-worker and engraver, and maker of mathematical instruments in metal and paper, Danfrie also invented the type used to print this book. Of the seven known types created by Danfrie, the ones used here are the second and fourth of his Gothic-cursive Civilite types, a font first created to mimic French script by Robert Granjon. Danfrie's early Civilite types were used in books printed by him and Richard Breton. Danfrie was appointed "graveur general des monnaies de France" in 1582. Mortimer, Harvard Italian 163; Carter and Vervliet, Civilite Types, 280.".