Treatise covering operation, defects and remedies of the locomotive, Westinghouse and New York air-brake, also questions and answers to first, second and third year's progressive examinations
A 1917 self-published railroad instruction manual by J. R. MacDonald, printed in Chicago for locomotive engineers and firemen preparing for progressive air-brake examinations. Its plates are hatched cross-sections of brake valves, triple valves and reservoirs, dense with letter and number callouts, lever handles and labelled pipe routes—useful for engraved machine-section textures, technical lettering and diagram-style ornament.
