O. Fisher— Physics of the Harth’s Crust. 283 
by Russell, and the text-book by Pickering, noted below. 
ese processes are in general use, and are safe and con- 
venient. 
Mass. Institute of Technology, Boston, Feb. 1, 1882. 
References upon Calibration of Closed Thermometer Tubes. 
Brsset—Pogg. Ann., vi, 287 (1826). 
Rupsere—Pogg. Ann., ix, 353, 566. 
= “¢ - Xxxvii, 376 (1836). 
as “. xl], 39, 562 (1837). 
Konirausca—Physical Measurements, p. 59 [Engl]. Transl. ]. 
Pickrrtne—Physical Manipulation, ii, 75 (1876). 
‘Tut1rseN—[Neumann’s Meth.], Carl’s Rep., xv, 285 (1879). 
RusseLn sf 43 Transl. from Thiesen.]| Amer. 
Jour. Sci., xxi, 373 (1881). 
Marrek—Carl’s Repertorium, xv, 300 (1879). [Solution by least 
uares, 
von Oxrtrincen—Inaug. Diss., Dorpat, 1865. [This I have 
H. | 
been unable to obtain.—s. w. 
Art. XXX.— Physics of the Earth's Orust ; by the Rev, 
SMOND FisHeEr, M.A., F.G.S.* 
Mr. OsMonpD FISHER has long been known to geologists as a 
writer upon the higher and more difficult problems connected 
with the evolution of the earth’s physical features. His quali- 
fications for this kind of discussion are rare to an extreme 
degree, for he possesses extended knowledge of geological sci- 
ence considered as a category of observed facts, and unites to it 
both wisdom and knowledge in physical science and great skill 
in mathematical analysis. Such men are indeed rare, and the 
need for them is very urgent. For upwards of ten years papers 
by him have appeared in the Transactions of the Cambridge 
Philosophical Society and in the Journal of the Geological 
Society, the more important of which deal with the mechanical 
t 
proportioned whole, with a strong bond of connective logic 
running through it. 
* Physies of the Earth’s Crust. By the Rev. OsMoNnD FisHER, M.A., F.G.S. 
pp. 299, 8vo. London: Macmillan & Co. 188]. 
Am. Jour. ae Serizs, Vou, XXIII, No, 186.—ApRIL, 1882. 
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