Henrion, D. (Denis), ca. 1580-ca. 1632 · A Roven : Chez Denis dv Chesne ... · leaf 90
de l’horifon; fçauoir eft AD , que nous pofons eftre de 20 pieds: puis par la precedente prop. foit mefuree AB, qui eft deprimee au def- fous de l’horifon , que nous pofons eftre 33 # pieds : & finalement foient adjouftees enfemble icelles AD , AB, & nous aurons $3 % pieds pour toute la hauteur BD… … trefme B : & par les precedentes prop, foient trouuees les longueur
Compasses (Mathematical instruments) · Measuring instruments · Geometry -- Early works to 1800
Internet Archive · Fisher - University of Toronto · Public domain (published before 1931). Free to use for anything.
![An illustration from Mathematicall magick. Or, the wonders that may be performed by mechanicall geometry. In two books. Concerning mechanicall powers [and] motions. Being one of the most easie, pleasant, usefull, (and yet most neglected) part of mathematicks. Not before treated of in this language (1648)](https://img.insideoutlibrary.com/img/200/ia-b30323915-308-0.webp)
