In the present application 4' is not necessarily equal to; but if P correspond to a line upon the grating, the difference of retardations for consecutive positions of P, so far as expressed by the term of the first order, will be equal to mX (m integral), and therefore without influence, provided v (sin 0-sin0') = nzX (11), where a denotes the constant interval between the planes containing the lines. [Please select]
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Literature would be a language which dispenses with gesture, facial expression, tone of voice; which is, in its halts, accelerations and retardations, emphases and concessions, the apotheosis of conversation. [Please select]
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