boiling, linseed oil becomes of adark brown colour, tenacious, and thickened,in which state it is employed in the manufac-ture of printers ink; and, by still longerboiling, it becomes black, almost solid, andelastically tenacious, like Indian rubber, inwhich state it serves for bird-lime. * Linseed… … Divide a b into three equal parts. From tliepoints c and d describe the circles a e d i andB H c K. Througb the intersection f and thecentre c draw f e ; and through g and d drawthe line g h. From f, with the radius f e,describe the arc e k ; and from g, with theradius g h, describe the arc h i ;…
Design · Decoration and ornament · Art
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-63-39.webp)
