Barton, Edwin H. (Edwin Henry), b. 1858 · London, Macmillan and Co., limited · leaf 90
ave no change from the normallevel. 44 KINEMATICS 71 Figs. 84 and 85 are from photographs of such divergentwave systems obtained by Dr. J. H. Vincent on the surfaceof mercury by points from vibrating tuning-forks. To extend either of these cases to that of the compositionof wave systems radiating… … Fig. 23.—Composition of Divergent Waves. points where crest falls on crest become circles whosecentres lie upon the axis of rotation containing the twopoint sources. The same applies to the points where crestfalls on trough, or trough on trough. 44. Huyghens Principle of Wavelets and Envelopes.…
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