Our guiding notion, therefore, is to effect the … quite natural to extend the principle necessary in … that material corpuscles ought to exhibit phenomena analogous … calculation ought to be much the same in … ought to be associated with a plane monochromatic … If the distances separating the elementary constituents [of a crystal] are of the same order of magnitude as the length … a maximum amplitude in certain easily calculable directions. … concentrated in certain directions. … [p. 185] by different methods and under different conditions … G.P. Thomson at Aberdeen and by Rupp at … Rupp even succeeded in obtaining the diffraction of … tangent. … Thus a brilliant series of experiments (to repeat) … Physics.
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