REVIEWS. 
Genesis of Ore Deposits. Published by the American Institute of 
Mining Engineers, New York, 1901. 8vo., 806 pages, illus- 
trated.) Price. 76.00) 
THE compilation and republication of the papers recently presented 
to the Institute, and bearing on the genesis of ore deposits, has resulted 
in a notable volume. Beginning with the famous treatise presented 
by Professor Franz PoSepny at the Chicago meeting of 1893, and 
including the discussions at that and the succeeding meetings at Vir- 
ginia Beach, Bridgeport, and in Florida, the volume is continued by an 
important group of papers read at the Washington meeting in 1900, 
with the succeeding discussions. It is concluded by a bibliography of 
additional papers on the same subject, read before the Institute, of 
188 titles. The showing is a most remarkable one, and the volume 
includes astatement of almost every advance in knowledge of the prin- 
ciples of ore genesis made in America within the last ten years; not 
that in every case it is the fullest statement of the authors’ views made 
here, but practically every advance made within that period in the 
study of American ore deposits, aside from regional work, is repre- 
sented by an author’s statement. The most notable exception is the 
comprehensive and valuable paper by Mr. Penrose on the “Superficial 
Alteration of Ore Deposits,” contributed to this JOURNAL in 1894." 
In all, twenty-two contributors are listed in the table of contents of 
the volume. There are eleven general papers and twenty-one criti- 
cisms or discussions. ‘The full list of authors is as follows: R. W. 
Raymond, Franz Posepny, W. P. Blake, Arthur Winslow, T. A. Rickard, 
Horace Winchell, John A. Church, S$. F. Emmons, G.F. Becker, F. M. 
F.. Cazin, Joseph LeConte, Cc. Ro) Van Hise, Walter Haney s Weeds 
Waldemar Lindgren, R. Beck, L. de Launay, Arthur L. Collins, H. 
Foster Bain, Charles R. Keyes, Frank D. Adams, J. H. L. Vogt, and 
jak. Kemp: 
Although the whole volume has been edited, much of it translated, 
and most of it obtained by the personal solicitation of the secretary of 
‘Jour. GEOL., Vol. I], pp. 288-317. 
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