REVIEWS 757, 
and a brief description of methods of chemical examinations of min- 
erals. 
The descriptive mineralogy is an abridgment of the sixth edition 
of Professor Dana’s System of Mineralogy and possesses most of the 
advantageous features of the larger work. However, much of the mate- 
rial of the latter work is necessarily excluded from a text-book. 
Perhaps the most striking feature of the new edition of this Text 
Book of Mineralogy is the condensation of the material, a great amount 
of information being compassed by so few pages. Its adaptability for 
class instruction, however, has yet to be tested, and it is hoped that it 
will prove satisfactory. Its need has been long felt and Professor 
Dana is to be thanked for its preparation. It is regrettable that the 
figures used for illustration vary so greatly in merit. While most of 
them are excellent, some are quite defective or are poorly printed so 
that the lettering is obscure or the edges of crystals confused. 
| il Bie 
Manual of Determinative Mineralogy with an introduction on Blow- 
pipe Analysis, by GEORGE J. BRusH. Revised and enlarged, 
with entirely new tables for the identification of minerals, 
by Samuel L. Penfield. Fifteenth edition. John Wiley 
& Sons, New York. Chapman & Hall, London, 1898. 
In 18964 revision of the introductory chapters of this book, relating 
to blowpipe analysis and the chemical reactions of the elements, was 
published, and was reviewed in this JouRNAL, Vol. V, p. 86. The 
character of the work published at that time was of so high an order 
as to raise expectations regarding the promised revision of the tables 
for the identification of minerals. These expectations have been fully 
satisfied by the present publication. The advancement of mineralogi- 
cal knowledge since the tables were first arranged in 1874 by Professor 
Brush has necessitated their expansion and rearrangement and has 
permitted of their being rounded out into more perfect form. The 
new tables are not only almost double the length of those published 
two years ago, but are more complete in the amount of data furnished 
under each mineral species. And, while the number of species of 
minerals in the new tables is much larger than formerly, the student is 
saved from confusion by the printing of the commoner kinds in 
stronger type than that used for the rarer ones. There are frequent 
