SCIENCE 



Priday, March 16, 1917 



CONTENTS 



The State Geologist and Conservation: Pro- 

 fessor A. H. Purdue 249 



The Stanford Meeting of the Pacific Division 

 of the American Association for the Ad- 

 vancement of Science: Dr. A. L. Bakrows. 252 



Scientific Events: — 

 Advisory Board on Wild Life Protection 

 in Canada; Professor Blanchard on the 

 Geography of France; The Bay den Me- 

 morial Award; Committees of the National 

 Besearch Council 254 



Scientific Notes and Netvs 256 



University and Educational Netos 258 



Discussion and Correspondence: — 



When is a Force Not a Force? Dr. Andrew 



H. Patterson 259 



Scientific BooTcs: — 



Kober and Sanson's Diseases of Occupation 

 and Vocational Hygiene: Professor C.-E. 

 A. WiNSLOw 260 



Proceedings of the National Academy of Sci- 

 ences: Professor Edwin Bidwell Wilson. 261 



Notes on Meteorology and Climatology : Dr. C. 

 F. Brooks 263 



Special Articles: — • 



Experiments with the Foucault Pendulum: 

 Professor Carl Barus 265 



Societies and Academies : — 



The American Mathematical Society: Pro- 

 fessor P. N. Cole. Oklahoma Academy of 

 Science : L. B. Nice 271 



MSS. intended for publicatio 

 review should be sent to Profess. 

 On-Hudaon, N. Y. 



and books, etc.. intended for 

 r J. McKeen Cattell, Garrison- 



THE STATE GEOLOGIST AND 

 CONSERVATION! 

 By conservation now-a-days is meant the 

 best use of our natural resources, without 

 waste. Probably the responsibility of con- 

 servation rests more upon the state geol- 

 ogist than any other state official, because 

 he is the one, more than any other, whose 

 duty it is to study and inform the public 

 upon the Occurrence, quality, quantity and 

 uses of the natural resources of the state 

 he serves. 



INEXHAUSTIBLE EESOURCES 



Natural resources may be divided into 

 two kinds : Those that are inexhaustible and 

 those that are exhaustible. Of the former 

 are such as sand, clay, road materials, 

 building stone and water power. But while 

 these and others are inexhaustible in quan- 

 tity, they do not occur universally, so may 

 become, and in most places do become, 

 products upon which it is vitally important 

 that the public be informed. 



Here it might be well to call attention to 

 the fact that geologists somewhat, and the 

 public to a large extent, lose sight of the 

 common things, in their anxiety to dis- 

 cover and develop the rare ones. Often a 

 bed of shale for brick making, sand for 

 building, gravel for concrete, or limestone 

 for cement, fertilizer, or other purposes, is 

 of more local importance than a bed of coal, 

 iron ore, or some other of the less common 

 products. A bluff of stone may stand un- 

 used for years, before some one will see its 

 value, perhaps for railroad ballast or con- 



1 Eead before the American Mining Congress, 

 Chicago, November 16, 1916. 



