80 Miscellaneous Intelligence. 
slates, garnet rock, and other metamorphic rocks which are as 
completely metamo orphic as any of pre-Paleozoic time ;* and that 
some of the kinds so closely resemble rocks of the Green Mountain 
series, that if lithological evidence is worth any a Mount 
Mansfield, the highest peak in these mountains, in Northern Ver- 
mont, is of the same age with some of the Paleozoic summits of 
erks An actual comparison of rocks has proved that the 
lithological evidence for the Huronian age of the Green Mountains 
will not hold, and that the denial of the existence of Paleozoic 
gneisses and mica slates connot be sustained by an appeal to 
Gr ose Mountain facts. 
Reptiles and Birds: ro account of their various 
oaein, with a description of the habits and economy of the most 
interesting, From the French of Louis Figuier. New edition, 
vised by Parker Gilmore (“ubique”). 624 pp. 12mo, with 307 
sates: New York, 1873. (D. Appleton & Co. )—Figuier’s 
popular works in science are well known. The figures are very g00 
9. Views of gy oO of the Elements, Force and Phenomena 
4 Nature and of M - by Ezra C, SramEn. pp- 0. 
New York, 1873. (Seribaer Armstrong & Co.)—This little vol 
ume contains many sound ideas. But the author is not sufficiently 
versed in science to a its principles, or to produce argu 
— on scientific points that have much weight. 
. A Manual of Photography Sounded on Hardwick’ s Photo- 
gr po Chemistry ; by Gro wson, M.A., Ph.D., of King’s 
College, London. Sth adiioa. 276 PP: 12mo. Philadelphia: 1873. 
light, &¢e,—thus making his manual more convenient than the orig- 
inal. The historical sketch sae wlbarsitks omits all allusion to the 
sei of American photographers to the art. But this does 
uch impair its value. The book is an eminently practical 
ia eset healc; bok too learned for the iuletaiees reader, and 
exact enough for all useful purposes in the practice of this — 
art. B, 
OBITUARY. 
CurisTorHEeR HanstEeEn, for many years Professor of Astronomy 
ae nie sae Mathematics at the University of Sense ce or- 
and Director of the Observatory there, died on the h of 
‘Apel faat: at the age of 88. He made — valuable ae 
to our knowl ge of terrestrial magnetism, and was sent by his 
Government on an expedition into Siberia, ‘with that object, in the 
year 1828. To him we principally owe the establishment of 11 11 
* This Journal, III, iv, 362, 450. 
