Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 400
one of two things,either to increase the outside lap, which would have atendency to cause admission to occur too late, or the angleof advance may be increased sufficient to cause cut off to Valves and Valve Setting 387 take place at half stroke, but to do this alone would causeadmission to occur… … Fig. 129 vance, A B C, is now 50°, where before it was 30°, as inFig. 125. The valve is central when the crank is at position 1;the high point of the eccentric being at point 4. The out-side lap, which before was 1 in., has had 7/16 in. added 388 Steam Engineering to it, making it 1 7/16 in. When…
![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-150-84.webp)
