Model making; including workshop practice, design and construction of models, a practical treatise for the amateur and professional mechanic .. (1919)
Yates, Raymond F. (Raymond Francis), 1895- ed · New York, The Norman W. Henley Pub. Co. · leaf 224
valve placed on the topto check the steam flow to the engine. Fig. 146 shows a very suitable type, although itpresents more difficulties in actua? construction than theone previously described. .It is necessary to have a cast-ing made for the waterback ring, which is provided witha flange to which…
Machinery
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