A short treatise on the designing and construction of gearing and mill-work. Accompanied by an explanation of the construction and use of the odontograph of Prof. Willis .. (1873)
[Scott, David] engineer. [from old catalog] · New York, D. Appleton and company · leaf 22
e distance between the centres by thenumber expressing the velocity of the wheel, and divide the result by the sum of the velocities ; or sub-tract the radius of the wheel from the distance between the centres: the remainder is manifestly theradius of the pinion. Now in the arithmetical question… … 2-f 3 5 Sum of radii c/ = R + r = 6 feet. Having the radii or diameters of the wheels given, it is not necessary to find their circumferences morder to determine the ratio of the velocities of their axes. The relative number of revolutions whichthey will make in a given unit of time is ascertained…
Gearing · Mills and mill-work · Odontograph
Internet Archive · Library of Congress · 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-266-171.webp)
