This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ...relate to i set of experiments on NaCl solution, ob3 is the value of the index of refraction at a point x deduced from 0 by the equation (4), and n, is that value of n calculated by putting B0 and J3, or b0 and bt obtained by harmonically analysing wobs in the equation (6) or (6'). A is?/obs--and shows how soon bt, lz become insignificantly small. In these experiments, the angle of the prism=45 2' 25." Table III, Time=31. Jan. 14" 58"'; temperature=l0,7 C Spect. reading for the normal=329 53' 10." The curves a-e in plate I. are the n-z curves with x as the ordinate and n as the obscissa; and those in plate II, are the curves obtained by projecting them supposed to be wrapped round a cylinder on the meridian plate perpendicular to the initial meridian, and are used in calculating B, and Table IV and the line a in plate V show the They show how nearly logI0 (JB 1--1 is proportional to t, as is required by Fick's law, and that fact may be looked upon as a proof that at least in NaCl, is independent of the concentration. Table IV. 5 In the experiment for Zn SO., the angle a of the prism=44 55' 35." The results are given in Tables Va--Vf. As n is not a linear function of w, we have to reduce n to a in this case. In the following tables, the numbers in the column u are the number of grammes of Zn S04 in 100 grammes of water. I have dispensed with calculating J50, B1, and the areas S, and s, in an arbitrary unit were determined only, because the fact that the phenomena of diffusion is fairly well represented by the equation (5), was made clear by the experiments on NaCl, and because in the determination of Jc, a knowledge of Sj and a, is sufficient. Table Va. Time=13. Feb....