masis accurate magisque clareobjeda exhibiturum Tubum, fi xqm proportio inter con- vexa illa fervetur. Profert deindc tabulam fequentem, in qua primse quidem co- lumnae numerosdenotare ait in pedibus Romanis longitudinem Tubi, five diame- tros arcuum fcutellarumraajorumpro vitris objedivis feu… … Tah^ SYNTAGMA IV. CAPUT I. 177 Tabula exhihens proportionem inter duovitraconvexabroTele[cG-> pio Ajlronomico cum duobus vitm conijexis. Longitudo Tubi live diametri fcutellaeprp convexo objedivo. Pedes Romam. Xongitudo diametri fcutella: pro conve- xo oculari. ^fnnm. Partes ioo, P^dis Romani,
Optics, Geometrical · Optical instruments
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