150 Bibliography. 
effect, corresponding with _ — science and elegant taste of the 
lamented proprietor. The combination of exact and thorough 
scientific knowledge with che: suiiresii sm of a discoverer and the rich 
but chastened diction of a poet, were never more remarkably united 
than in him. His letters were a rich feast to his friends. Full o 
information and thought, and the kindest feelings, and being punctual in 
responding to letters addressed to him, those who were so happy as to 
enjoy his confidence and eo always hailed with joy his 
beautiful and well known inscriptio 
Dr. Mantell’s early training in ne was under pious parents, and 
of the Bible by heart. This statement, which came to us from his 
own lips, is in accordance with a fact which illustrates the power of his 
— that, in pt hipaa he would often repeat with perfect facil- 
ity and accuracy, whole pages of his favorite English classics, and wi 
that finished and graceful ea for which he was so remar es 
B. S., Sr 
Dr. Daniet Draxe.—Dr. Drake died in Cincinnati, his place of resi- 
dence, Nov. 7, aged 67 years. _ defer to another number a farther 
obituary of this distinguished m 
Dr. Prarr, senior of the perneattats of the Royal University of Kiel, 
has died within a few months past, at the age of 79. 
VII. Brstiocrapny. 
1. First Principles of Chemistry ; me B. Sema Jn., third agent 
555 pp. 12mo. Philadelphia, Loomis é& Peck. —This work has 
throughout revised and = a great sence re-written by the author, ra 
it has thus been brought up to the present state of the science. Mo 
over the illustrations have been much increased in number. 
The latter portion of the volume, embracing about 160 pp.; is an in- 
troduction to Organic Chemistry, by Mr. T. Sterry Hunt, Chemist 
the Geological Commission of Canada, and has been re-written by him 
_ for the present edition. The author is well known to our readers, 
his various communications to the Journal of Science during the last 
six years, and we find many of his peculiar views embodied in the 
treatise before us. Although limited in its plan, and intended as@ 
work for the young student, there are many points of interest - pate 
ee which render the book not unworthy the notice of more advance 
sc 
The theory of chemical changes announced by Mr. Hunt, i is very sim- 
ple. The changes are reduced to two cases; direct union on the one 
hand, and direct division on the other: either of these may occur Ine? 
pendently of the other, but they are very often united; the body fo 
by the first — is directly broken up by the second, and if the affini- 
division are si the original factors, and we have the © oar of do 
decomposition, or equivalent wabetitotion, } in which proc 
that direct union always forms an intermediate stage. This is illustra 
ted by the case of olefiant gas C4 Ha, ehiek unites directly with Cl2s 
to form the body Ca H Cle; this under conditi 
