Gas and Oil Engine Operation including Gas Producers and Petrol Engines
viii, 198pp, 6pp publisher's catalogue; fold out plate. Blue cloth-covered boards; black titles on front and spine. 12mo. Sun-faded spine, lightly rubbed extremities. Text block edges starting to tan. Endpapers starting to fox and tan, rear pastedown rippled (manufacturing fault). Internally neat, clean, bright and tight. 72 figures including a folding plate of a Mond Non-recovery Producer Gas Plant. John Okill [1875-1947] was the inventor of the Okill Indicator which records the peak pressure in a cylinder.
