SCIENCE 



Friday, January 10, 1919 



CONTENTS 



The American Association for the Advance- 

 ment of Science: — 



The Need of Conservation of Our Vital and 

 Natural Resources as emphasized by the 

 Lessons of the War: President Henkt 

 Stdrois Drinker 27 



Chemistry and Medicine — o Triiute to the 

 Memory of John Harper Long: Professor 

 Julius Stieglitz 31 



Scientific Events: — 

 Biological Surveys of States by the United 

 States Department of Agriculture; The Cen- 

 sus Bureau; The Bureau of Standards .... 38 



Scientific Notes and News 40 



University and Educational News 43 



Discussion atid Correspondence: — 



Two New Instances of Polyembryony among 

 the Encyrtidce: Dr. L. O. Howard. The 

 Foundations of Mechanics: Paul J. 

 Fox. Tropical Enervation: Vaughan Mac- 

 Caughet 43 



Scientific BooTcs: — 

 Toung on Stoichiometry : Professor J. 

 Livingston Morgan 46 



The Proceedings of the National Academy of 

 Sciences : Professor Edwin B. Wilson 46 



Special Articles: — 



On the Nature of the Pigmentation Changes 

 following Hypophysectomy in the Frog 

 Larva : Wayne J. Atwell 48 



The Paleontological Society: Dr. R. S. Bass- 

 LER 50 



The American Psychological Association : Pro- 

 fessor Herbert Sidney Langfeld .tI 



The Optical Society of America: Dr. P. G. 

 NUTTINO 52 



MSS. intended for publication and books, etc.. intended for 

 review should be sent to The Editor of Science, Gairison-on- 

 Hudson, N. Y. 



THE NEED OF CONSERVATION OF OUR 

 VITAL AND NATURAL RESOURCES 

 AS EMPHASIZED BY THE LES- 

 SONS OF THE WARi 



The great war, now ended, frightful as have 

 been the evils it entailed on the world, should, 

 from the standpoint of our country at least, 

 be recognized as having brought to us an 

 awakening in directions that will be of lasting 

 benefit to the nation. 



It has been a cheap and easy criticism to 

 stigmatize our people as money-loving, seK- 

 centered, and materialistic, and this characteri- 

 zation, apparently generally held in Germany 

 as a true picture of the people of the United 

 States and of our national life, has, by some, 

 even here at home, been more or less accepted 

 as correct. The great soul of the American 

 people, their intense patriotism and love of 

 country, their devotion to ideals of right and 

 of self-sacrifice and altruism, were not dor- 

 mant but were hidden. We have enough of 

 the Anglo-Saxon of our English brethren in 

 us still not to seek to parade our better traits 

 in boasting self-assertion — but when the time 

 of trial and sacrifice comes, our people re- 

 spond, and respond as a nation. 



A marked instance of this national trait was 

 given in our treatment of Cuba twenty years 

 ago. It was incredible to some of our foreign 

 critics that this country could enter into a war 

 with Spain solely to remedy the abuses of her 

 government of Cuba, and to free Cuba, yet the 

 event showed that such was actually the case 

 — and now the world recognizes that we en- 

 tered into the world-war just ended, solely and 

 only as a matter of high national duty — and 

 with no thought of national gain in money, 

 trade or territory, but only because we recog- 



1 Address of the Vice-President and Chairman 

 of Section of Engineering of the American Asso- 

 ciation for the Advancement of Science, Balti- 

 more, December 26, 1918. 



