June 5, 1914] 



SCIENCE 



839 



where the radium ABC goes to after the injee- 

 tioii'. The injection is absolutely painless. If the 

 injection is made subcutaneously a large fraction 

 of the activity remains in the neighborhood of the 

 point of injection, and the rest is carried off in the 

 lymph and blood streams. The rapidity with which 

 the activity gets into circulation is astonishing. A 

 drop of blood taken from another part of the body 

 only a few seconds after the injection is more 

 radioactive than earnotite or pitchblende ores. It 

 would seem that this might prove to be a delicate 

 method of studying the flow of fluid through the 



On making tests by means of the gamma rays 

 an hour or an hour and a half after the injection 

 he found that there was very little activity in the 

 brain and lungs, but that there was a tendency 

 for the substances to deposit out in the liver, 

 spleen and kidneys. 



Histological examinations were made by Dr. E. 

 E. Tyzzer, who found a marked destruction of the 

 bone marrow and of the leucocytes. Further, if the 

 injection is made either into the tumor or the 

 veins of a mouse with a tumor there is a decided 

 destruction of the tumor cells. 



Some Further Considerations in the Development 

 of the Electron Conception of Valence: K. G. 

 Falk. (Introduced by Professor Bogert.) 

 The Valence of Nitrogen in Ammonium Salts: 

 William Albert Notes. (Introduced by Pro- 

 fessor H. 0. Jones.) 



The specific rotation of solutions of amino- 

 camphonanie and of aminodihydrbcampholytic 

 acids have been determined, also the rotations of 

 the anhydrides, hydrochlorides and sodium salts of 

 these acids. A comparison of these rotations fur- 

 nishes strong evidence that the free aminoeampho- 

 nanic and the aminodihydrocampholytic acids exist 

 in the form of cyclic salts, containing a ring of six 

 atoms and nitrogen in the quinquivalent form. 

 The a-aminocampholio and /3-aminoeampholio acids, 

 on the other hand, as indicated by the rotation of 

 their solutions, do not form such cyclic salts, prob- 

 a.bly because the salts, if formed, would contain a 

 seven-atom ring. The study of these compounds 

 furnishes considerable evidence that nitrogen is in 

 reality quinquivalent in ammonium salts and that 

 such salts are not merely addition compounds 

 formed by the union of the aeid with the amino 

 compound in such a manner that each molecule re- 

 tains its original structure. 



Determination of the True Atomic Weight of 

 Madium: Gustavus Hinrichs. 



FRIDAY, APRIL 24 



Afternoon Session — 2 o'clock 

 Edward C. Pickering, D.Sc., LL.D., F.E.S., 

 Vice-president, in the chair. 



Presentation of a portrait of the late Samuel 

 Pierpont Langley, LL.D., a former vice-president 

 of the society, by Cyrus Adler, A.M., Ph.D., on be- 

 half of a number of members of the society. 



The Magnetic Phenomena of Sun-spots; The Gen- 

 eral Magnetic Field of the Sun: George E. 

 Hale. (Illustrated with lantern slides.) 



Summary of Researches, Department of Terrestrial 

 Magnetism, 1904~i4: Louis A. Bauer. (Hlus- 

 trated.) 



On the Colors of the Stars in the Cluster M 13: 

 Edward E. Barnard. 



The Use of a Photographic Doublet in Cataloguing 

 the Position of Stars: Frank Schlesinger. 



The Distribution in Space of 90 Eclipsing Stars: 

 Henry Norris Russell. 



The Eclipsing Variable Stars f Oriones and 88 d 

 Tauri: Harlow Shapley. (Introduced by Pro- 

 fessor H. N. Eussell.) 



Some Features of Moon's Motion and a Problem 

 in Isostasy : Ernest W. Brown. 



The United States as a Factor in World Politics: 



Leo S. Rowe. 



After an analysis of the circumstances that have 

 made the United States an important factor in 

 world politics. Dr. Rowe proceeded to discuss the 

 lack of adjustment between the international posi- 

 tion of the United States and the national thought 

 of the American people. The country has ad- 

 vanced to the rank of a world power, but the 

 standards of public opinion with reference to in- 

 ternational affairs have failed to make a corre- 

 sponding advance. In discussing the situation, the 

 speaker said: 



We are at the present moment witnessing one of 

 the most serious consequences of this lack of ad- 

 justment which is affecting the international posi- 

 tion and influence of the United States to a degree 

 which can not help but arouse the grave concern 

 of every thoughtful and patriotic citizen. In a 

 brief period of flf teen years we seem to have sacri- 

 ficed the position of leadership in the maintenance 

 of world peace, and have become one of the dis- 

 turbing factors in world politics. How is it, it will 

 be asked, that a nation which through the contri- 

 butions of more than a century has gained an en- 

 viable position as a leader in the great movement 

 for the advancement of international good-will, a 

 nation whose founders dreamed of a period of uni- 



