Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 288
chanical construction of his wheels and theirdetails enabled Mr. Boyden to obtain large percentages of effect, and led to thegeneral introduction of turbines. In form and construction they have beenmuch simplified, and with economy. Some makers still retain a form of upperhangers and bottom guides,… … y//////////77Z<. q / Z 3 4- yS 6 7 8 9//>3. Fig. 592.
Mechanical drawing
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