Bibliography. 149 
20. Instruction in Chemical Analysis [Quantitative]; by Dr. C. Rem- 
cius Fresenius, edited by J. Lloyd Bullock. I. Churchill; London, 
1846. 8vo, pp. 626.—This is essentially an elementary work, as onl 
the more commonly occurring substances are mentioned ; yet it will prove 
acceptable even to the proficient. 
The characteristic feature of the work is its minute and systematic ar- 
rangement, by which all repetition is avoided, and facility of reference is 
promoted. The portion of the work treating of “ Operations” and ** Re- 
2 
tains a series of well arranged “ Examples for Practice,” particularly use- 
to those who are deprived of the advantage o personal instruction. 
21. Taschenbuch fiir Freunde der Geologie; von Kart Cisar v. Leon- 
Harv; Erster Jahrgang; mit einem Stahlstiche, einer Lithographie und 
mehreren Zw is wor 
to which this rapidly advancing science has arrived. It is literally, what 
for the Friends of Geology. ‘The volume before 
us—the first of a proposed series—contains essays on gold, silver, and 
the other metals; on fossils; the artificial formation of minerals; facts 
relating to the various rocks, and their economical uses; on caverns; 
coal deposits, mountains, meteoric stones, the sea, rivers, land, coral isl- 
ands, snow, ice, and various other topics, about which much valuable and 
. tory 
Washing ton; by Lieut. J. M. Gruiss, U.S. N., Washington, 1846, Svo, 
pp. xxv, and 671.—This volume contains the results of four years obser- 
vations with a transit instrument, which although unequal in power and 
focus are five vertical lines and one horizontal ; and the eye piece 
. 
moves in a slide so that it may be brought opposite each wire in suc- 
cession, 
