540 REVIEWS—HANDBUCH DER MINERALCHEMIE. 
Ganocephala, in which is manifested an intermingling, as it were, of 
the fish and reptile ofganizations; and it terminates, properly, with 
the Chelonia—each order foreshadowing more or less distinctly, the 
one above it. By this arrangement, however, admirable as it is in 
its details, the batrachians are thrown out of position, being placed 
unavoidably at the end of the series, or between the chelonia and the 
next succeeding class, the birds. The limits of the work forbid any 
very minute treatment of this succeeding class, and of the mammalia ; 
but of the obscurer mesozoic forms of the latter, a sufficiently copious 
analysis is given, together with various able generalizations embodying 
the leading pomts of interest belonging to the other types. The 
reader consequeutly, who may desire a compendious view of the 
present state of Paleontology, will find, in Professor Owen’s treatise, 
a work exactly suited to his wants. EK. J. C. 
rs 
Handbuch der Mineralchemie. Von C. F. Rammelsberg, Leipsig : 
Engelmann, 1860. 
Original investigators are not, in the way of authorship, proverbial 
for great industry. Professor Rammelsberg, however, forms a remark- 
able exception to the class. In addition to constant communications 
tu scientific journals, scarcely a year elapses without the emanation 
from his fertile pen, of some learned treatise or useful manual. His 
latest production of this kind is a closely printed octavo, of over a 
thousand pages, bearing the title placed at the head of this notice. 
This title, however, is somewhat inappropriate, and likely to lead to 
misconception regarding the true character of the book: the pre- 
sent volume being strictly a treatise on chemical mineralogy, com- 
prising a detailed view of the chemical characters and composition of 
all known minerals, with some introductory remarks on classification, 
mineral formule, isomorphism, and other cognate subjects. It is there- 
fore, if not actually, at least essentially, a revised edition of the 
“Handworterbuch des chemischen Thiels der Mineralogie” brought up 
to the present state of the science. The author, in his preface, claims 
for the work the character of an entirely independent production, 
and this is so far true, inasmuch as the earlier work has been entirely re- 
written; but in general plan, and treatment of subject, the two are 
essentially alike. The present work contains (with a few accidental 
