Locomotive catechism; an up-to-date, practical and complete work on the locomotive--treating on the design, construction, repair and running of all kinds of locomotives .. (1908)
Grimshaw, Robert, 1850- [from old catalog] · New York, The N. W. Henley publishing company · leaf 601
. What is the proper axial section of a headlight reflector? A. A parabola ; this is, referring to Fig. 389, a curve in which 586 LOCOMOTIVE CATECHISM. every point is just as far from the focus F. as.from a certainline AB at right angles to its axis CD. Thus, in the cut,a b — b F; c e = e F, and so… … -A Fig. 391. cS Fig. 393.
Locomotives
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
