346 Scientific Intelligence. 



The illustrations are well-chosen and attractive, and the dia- 

 grams clear. h. a. b. 



7. A Laboratory Course in Physics for Secondary Schools ; 

 by R. A. Millikan and H. G. Gale. Pp. x-H34. New York 

 1906 (Ginn & Co.). — This is a collection of fifty-one experiments 

 designed to accompany the text-book noticed above. The experi- 

 ments are well chosen and clearly described ; the necessary appa- 

 ratus is simple in character and well designed for its purpose. 



H. A. B. 



8. Outlines of the Evolution of Weights and Measures and 

 the Metric System; by William Hallock and Herbert T. 

 Wade. Pp. xi + 304. New York, 1906 (The Macmillan Co.). — 

 The first chapter of this work gives an interesting outline of the 

 historical development of metrology, so far as it is known, from 

 the earliest times. The succeeding eight chapters have to do 

 mainly with the metric system : its origin, development and 

 extension throughout Europe ; its advantages for commerce, 

 manufacturing, engineering, medicine and pharmacy ; and the 

 international electrical units which have been derived from the 

 fundamental metric units. 



A final chapter deals with standards and methods of compari- 

 son and an appendix contains tables of equivalents and useful 

 constants. h. a. b. 



II. Geology. 



1. United States Geological Survey, Charles D. Walcott, 

 Director. — Titles of publications recently received are con- 

 tained in the following list: 



Folios. — No. 138. Redding Folio, California. Description 

 of the Redding quadrangle by J. S. Diller. Pp. 14, with maps 

 of topography and areal geology, structure and columnar sec- 

 tions. 



No. 139. Snoqualmie Folio, Washington. Description of the 

 Snoqualmie quadrangle by George Otis Smith and Frank 

 Cathcart Calkins. Pp. 14, with maps of topography, areal 

 geology, structure and columnar sections. 



Professional Papers. — No. 50. The Montana Lobe of the 

 Keewatin Ice Sheet; by Fred. H. H. Calhoun. Pp. 62, with 

 7 plates and 31 figures. 



Bulletins. — No. 275. Slate Deposits and Slate Industry of 

 the United States; by T. Nelson Dale, with sections by E. C. 

 Eckel, W. F. Hillkbrand, and A. T. Coons. Pp. 154, with 25 

 plates and 15 figures. 



No. 277. Mineral Resources of Kenai Peninsula, Alaska. 

 Gold Fields of the Turnagain Arm Region ; by Fred. H. Moffit. 

 Coal Fields of the Kachemak Bay Region ; by Ralph W. Stone. 

 Pp. 80, with 18 plates and 5 figures. 



No. 278. Geology and Coal Resources of the Cape Lisburne 

 Region, Alaska; by Arthur J. Collier. Pp. 54, with 9 plates 

 and 8 figures. 



