Steam engines, a thorough and practical presentation of modern steam engine practice (1920)
Ludy, Llewellyn V., 1875-, American Technical Society · Chicago, American technical society · leaf 27
. After the joints are well groundthe heads are tightly drawn up against the cylinder by means ofbolts suitably arranged. A sheet iron jacket 19 Is put around thecylinder, leaving an air space 21 between the cylinder walls and thejacket. This air space retards the cooling off of the cylinder…
Steam-engines
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