Bibliography. . 299 : 
and the columns of multiples were computed separately by himself 
and another. From the care thus taken, and the thorough knowledge 
ness of the work. Those atomic weights have been taken that were 
med most trustworthy, the determinations of Berzelius, being al- 
aaa as by Rose, the greatest weight; some recent determinations 
have been ard for want of confirmation. A column of logarithms 
has been added to the tables by Mr. Dexter. A large part of the com- 
pounds given in Rose’s work under chlorine and sulphur have been 
5 eg as they were “of comparatively little practical use.” The 
volume commences with an introduction of a dozen pages, iy 
by different experimenters, and observes that in some cases he has de- 
tected a small error of computation. The number determined for tita- 
nium by oe from Rose’s analyses is 301°55, while it should be 
301304. Ina similar manner the number for osmium was found to 
be 1243-624, abn of 1242-624; that of Pngr'a shows be 1183-36, 
instead of 1188:36; that of phosphorus as computed by Berzelius is 
1, while it showy be make iy The tables are 7 printed ina air 5 
see type and are easy of refer 
2. First Biennial te on ie Guoiiey ap “Alabainae by M. Tvo- 
Y, Geclogist of the State; Professor of Geology, er in the Uni-. 
MEY 
versity of Alabama, 176 pp. 8vo. Tuscaloosa, 1850. D. J. Slade. 
’s 
—Prof. Tuomey presents 4 this Report the results of a gen netal recon- 
Noissance of the State, mentioning its great geological features and its 
resources, in order to show what is required ee future éxplorations 
: ortance which attaches to the surv The results ob- 
tained exhibit the state as rich in various min ord products as as well as 
n facts of geological inlereaie and we shall look for much profit and 
sigalg from its full survey by one so capable and so exact in ob- 
servati ‘The fallowlog facts are from this first Veoh. Report 
Matar hi phic Rocks enter Alabama from the upperco ner of Carroll i 
