60 Scientific Intelligence. 
Silurian of the Primordial and Canadian periods was observed, 
and p Upper Silurian beds, but no Devonian, the next 
strata obra being Carboniferous ; whether the Subcarbonifer- 
ous is included he leaves doubtful. Above the Carboniferous 
come the Triassic, Jurassic, Cretaceous and Tertiary. A colored 
oe map of the region accompanies the Report. 
eport of Progress of the Mineralogical, Geological and Phys- 
‘ead Survey of the State of Georgia for the period from Sept. 1 to 
Dec. 31,1874; by Guorce Littte, State Geologist.—This Report 
of progress gives brief notices of some of the mines and ores of the 
State, with also accounts of valuable localities of marble, roofing 
slate, mica for stove doors and other utensils of economical value, 
notice of some of the localities “of _ a There are 
n 
6. Michigan, being condensed popular eames of the Topog- 
raphy, ee and Geology of the State; by A. WrxcuEtt, 
LL.D., rof. of Geology, Zoology and Botany i in the Univer- 
sity of ‘Michigan, 122 pp. 8vo. 1873. Extract from Walling 
Atlas of Michigan.—This is a valuable résumé of the results ob- 
tained by Prof. Winchell in his investigations into the Topography, 
Geology, and Climate of Michigan. The volume is accompani 
by four maps—one a topogra hical map eons rome lines ; the 
second a colored sper ton chart of Michigan prepared from 
the latest observations; and the other two afnstoboptent charts, 
giving the isothermal lines for spring, autumn, and the year. 
7. Analysis of Atgirite sii Hot Springs, Arkansas; by J. 
Lawrence Sira. — Th rence of wgirite at Hot Springs 
sae Cove); Arkansas, so fis ninioad by C. U. Shepard in 
vol. xxxvii (p. 407), for 1864. The following are 
cae: results of my sens ipa of the mineral: 
ili 
Thea, 2 ee ier ws bee SF 
‘Alaming,-2. 20569 Hoss FS2 
Peroxide of i iron, --- 23°30 
Serer Of Won, SUiresi Gl aol ea 9°45 
Lim pctlecuers ais tly iS eee 08 
Mayi civeesyes eo Oad 
Soda "with trace of potash, - cuOsi sees 11°88 
Titanic SOS a CE ‘18 
100°33 
The specifie gravity is 3°53. 
8. Beto nd Appendix to Danas Mineralogy; by Epwarp 5. 
Dana; 64 pp. 8vo. New York, March, 1875. (John Wiley & 
“eR ae yy Bg ia: eae to Dana’s Mineralo ogy was preparec 
rush. The present Appendix follows that 
after 2 see of three years, and is intended to make the work 
complete up to 1875. It includes full descriptions of 92 mineral 
Species announced as new since March, 1872, with also explana- 
tions of a considerable number of other names new to the science 
but not properly helonging to distinct species. It also embraces 
references to all mineralogical articles published in the many 
