De maculis solarib. et stellis circa Iouem errantibus : accuratior disquisitio, ad Marcum Velserum ... perscripta. Interiectis obseruationum delineationibus (1612)
Scheiner, Christoph, 1575-1650 · Augustae Vindelicorum : Ad insigne Pinus · leaf 10
DEi.MÁACVYVLIS Lemma. | à Tptodudis trianguli cu- |^. ^ iuscung;rectanguli qua- … — gulis,omnes omnib. fimul, fingulos fingulis feorfim.. - Sit datum triangulum ab c; angulusq;ba c, re&us. pro- ducanturlatera quaquauerfum; ab ind & e, acinf&g, b c, in h &i. Dicojam, fiper fe&tionem quamlibet laterum com- muneri, a, b, c; agatur recta quzlibet, quz fit perpendicularis: ad vnum…
Sunspots · Astronomy -- Early works to 1800
Internet Archive · Fisher - University of Toronto · Public domain (published before 1931). Free to use for anything.
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