. Appleton's dictionary of machines, mechanics, engine-work, and engineering. all. It is no longer the same when in any manner the form of the new wheel isaltered so as to approach those formerly known; all partitions, projections, and asperities which areeither within or without two concentric circumferences, considerably diminish the theoretic velocity ofrotation due to the fall, on account of the continual shock of these bodies in motion against the water inrepose. Then it is not surprising if the useful effect of reacting wheels, when experimented upon, hasnever risen above 50 per cent.; t
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. all. It is no longer the same when in any manner the form of the new wheel isaltered so as to approach those formerly known; all partitions, projections, and asperities which areeither within or without two concentric circumferences, considerably diminish the theoretic velocity ofrotation due to the fall, on account of the continual shock of these bodies in motion against the water inrepose. Then it is not surprising if the useful effect of reacting wheels, when experimented upon, hasnever risen above 50 per cent.; that is to say, about the rate of breast-wheels of the usual varieties. The expenditure of water in Fig. 3820 with the internal action, is sensibly independent of thegreater or less reaction of the wheel. In Fig. 3819, with external action, this cannot take place on ac-count of the counter-pressure arising from the formation of an eddy in the interior ; but this counter-pressure is, however, much less than might be supposed. I have demonstrated that when a fluid forma
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
