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 249
Fig. 141. Allen Balance Valve, Pennsylvania Railroad Engine,Class O. Central Lengthwise Vertical Section. … Fig. 142. Allen Balanced Valve, Pennsylvania Railroad Engine,Class O. Vertical Cross Section.
Locomotives
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
