Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 863
nvariably determine that which may be resorted to with most advantage; but it is of the ut-most importance that in the process of deeding the wheel be not thrown out of truth. To avoid this,the operations ought to proceed from at least two points; and if the wheel be of large diameter it willgive a… … Each bucket consists usually of two plates placed at a determinate angle A D F, Fig. 3780 ; and some-times of three, as in the form indicated at P M. The bucket is an essential part of the wheel, which oughtto be determined not by the rule-of-thumb practice admissible in some of the less important…
Mechanical engineering
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