824 REVIEWS 
Synopsis of Mineral Characters. By RatpH W. RicHarps. New 
York: John Wiley and Sons, 1907. Pp. 99. 
This is a compact little book, strongly bound in leather, and of con- 
venient size for the pocket. Minerals, mineralogical terms and tests, are 
all arranged alphabetically. The descriptions are concise and accurate 
and include all the more essential properties of the species described. 
The book will be useful both to students in the laboratory and field, and 
to miners and others who are interested in minerals. 
C. W. W. 
Fijty-seventh Annual Report oj the New York State Museums jor 1903, 
containing the Twenty-third Report of the State Geologist, 1903. 
Albany, No Vs) 1005; 
Contains articles on peat, the gypsum industry, abrasives, distribution 
of Hudson Schist and Harrison Diorite in part of the Oyster Bay quad- 
rangle, the northeast extremity of the pre-Cambrian Highlands. In the 
appendices are ‘‘The Geology of the Vicinity of Little Falls, Herkimer 
Co.,” by H. P. Cushing; ‘New York Mineral Localities,”’: by H. P. 
Whitlock; ‘‘Report of the State Paleontologist, 1903,” by J. M. Clarke; 
“Feeding Habits and Growth of Venus mercenaria,” J. L. Kellogg. 
Molybdenum. By E. C. ANDREWS. Pamphlet No. 4, Geological 
Survey, Mineral Resources, Department of Mines and Agricul- 
ture, New South Wales. Pp. 17. Sydney, 1906. 
The ore of molybdenum is molybdenite in quartz. It is directly asso- 
ciated with intrusions of fine ‘‘sandy” granite about which the ore forms 
contact deposits. One mine produces practically all the molybdenite 
from New South Wales. Its output in 1904 was 254 tons, value £2,726. 
Cambrian Faunas of China. By CHartes D. Watcortt. (Proceed- 
ings of the U. S. National Museum, Vol. XXIX, pp. 1-106. 
Washington, D. C., 1905.) 
Faunas embracing 48 genera and 172 species are listed from three 
formations in the upper and middle Cambrian. Five new genera and 
about 125 new species and varieties are described. ‘The upper Cambrian 
faunas are related to those of North America and northwestern Europe. 
This is a preliminary report, published in advance of a fuller one with 
plates, that will appear this year. C. W. W. 
SOS, aa 
