September 29, 1911] 



SCIENCE 



403 



ential equations of physics. In addition lie 

 will give four general lectures on Saturday 

 mornings at 10.30 a.m., as follows: 



October 7 — "The Definition of Solutions of 

 Linear Partial Differential Equations by Boundary 

 Conditions. How is the Problem to be Set?" 



October 14 — ' ' On the Recent Applications of 

 certain Mathematical Theories to Physical Prob- 

 lems: Ordinary Differential Equations, Integral 

 Equations, Integro-differential Equations, etc." 



October 21 — ' ' Analysis Situs, its Eole in several 

 Mathematical Questions, especially in Finite Cor- 

 respondences and Differential Equations. ' ' 



October 28 — "Elementary Solutions of Partial 

 Differential Equations and Green's Functions, 

 with Especial Attention to the Latter. ' ' 



Professor O. P. Hood, head of the depart- 

 ment of mechanical and electrical engineer- 

 ing at the Michigan College of Mines, has 

 heen appointed chief mechanical engineer of 

 the Bureau of Mines with headquarters at 

 Pittsburgh, Pa. 



Dr. Daniel W. Fettebolf has resigned as 

 demonstrator of chemistry and toxicology in 

 the University of Pennsylvania, to accept the 

 position of acting assistant surgeon in the 

 U. S. Army, with a permanent station in New 

 York. 



Professor Frederick Starr, of the Univer- 

 sity of Chicago, whose anthropological studies 

 have covered Mexico, Japan and the Kongo, 

 sailed from Seattle in August for Korea, 

 where he will spend the next few months. 



Mr. George Garneehas arrived in this 

 country from the French Congo, bringing 

 with him for the New York Zoological Park 

 a female gorilla, about eighteen months old. 

 It is said to be the second gorilla which has 

 reached this country alive. 



Sir Clements E. Markham has been se- 

 lected president of the eighteenth Interna- 

 tional Congress of Americanists, to be held 

 in London beginning on May 27, 1912. Ap- 

 plications of membership in the congress and 

 titles of papers should be sent to the secre- 

 tary, F. C. A. Sarg, Esq., Eoyal Anthropo- 

 logical Institute, Great Russell St., London. 

 The British Association for the Advance- 

 ment of Science at its Portsmouth meeting, 



constituted a new section devoted to agricul- 

 tural science, to be known as Section M. 



The thirty-second meeting of the Society 

 for the Promotion of Agricultural Science, 

 will be held at Columbus, Ohio, on Tuesday, 

 November 14, 1911, immediately preceding 

 the convention of the Association of Ameri- 

 can Agricultural Colleges and Experiment 

 Stations. Headquarters will be at the Great 

 Southern Hotel, where the 'sessions will prob- 

 ably be held. 



A CALL has been issued by President Seth 

 Low of the National Civic Federation for a 

 meeting of the new Pure Food and Drug De- 

 partment of the federation, which will be held 

 in the rooms of the New York Board of Trade 

 and Transportation on Monday, October 

 2. Among the speakers will be Dr. Harvey 

 W. Wiley, chief of the Bureau of Chemistry; 

 Dr. Thomas Darlington, ex-Commissioner of 

 Health for the city of New York, and Dr. 

 William C. Woodward, secretary of the Amer- 

 ican Public Health Association. 



Foreign journals state that a special com- 

 mission was recently appointed to study the 

 utilization of aeroplanes for ensuring rapid 

 communication with districts of the Belgian 

 Congo that are still unprovided with railways 

 and roads, and that it has been decided to 

 await the results of certain tests to be carried 

 out in France. Attempts will be made to 

 traverse a desert about 750 miles across, and 

 to establish landing stations 250 miles apart, 

 fitted with wireless telegraphy. The aero- 

 planes will have to convey three passengers 

 and a relatively heavy load of victuals, water, 

 tools, etc. It is hoped that this line will be 

 established in 1912. A first subsidy of $80,000 

 has been voted for the establishment of these 

 communications. 



A committee dealing with the hygienic as- 

 pects of illumination has been appointed by 

 the minister of the interior in France. The 

 objects of the committee include the general 

 effects of illumination on health, the framing 

 of simple rules as to the best means of apply- 

 ing customary systems of lighting to various 

 industrial operations, the nature and causes of 



