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SCIENCE 



[N. S. Vol. XXVIII. No. 722 



lecture of the evening was upon the subject 

 " Modern Practise in Color Photography," 

 and Mr. Alfred Norton Goldsmith, B.S., the 

 lecturer, described and illustrated by appa- 

 ratus and specimens the present methods of 

 producing color photographs. 



Dr. "William E. Brooks, director of Smith 

 Observatory and professor of astronomy at 

 Hobart College, lectured recently at Wells 

 College on " Other "Worlds than Ours." The 

 lecture was illustrated with stereopticon views 

 and motion slides. 



A MEETING of trustees, faculty, students and 

 alimini, to commemorate the life and work 

 of the late Dr. D. C. Oilman, formerly presi- 

 dent of Johns Hopkins University, will be 

 held in McCoy Hall on the afternoon of 

 Sunday, November 8. 



Dr. Adolph "WiJLLNEE, professor of physics 

 at Aachen, died on October 6, at the age of 

 seventy-three years. 



The deaths are also announced of Dr. A. 

 W. Pohl, professor of chemistry at St. Peters- 

 burg, at the age of fifty-eight years, and of 

 Dr. Lissauer, of Berlin, known for his work 

 in anthropology. 



The Astronomical and Astrophysical So- 

 ciety of America will hold its next meeting, 

 in the summer of 1909, probably at the Yerkes 

 Observatory. The exact date has not yet been 

 fixed, but it is expected to precede by a few 

 days the "Winnipeg meeting of the British 

 Association for the Advancement of Science, 

 which will open on August 25, 1909. 



The steamer Pourquoi Pas, with the Char- 

 cot Antarctic exploration expedition on board, 

 arrived at Eio Janeiro on October 12, on its 

 way to the South Polar regions, according to 

 press dispatches. The ship will remain there 

 for a week and the Geographical Society will 

 give a reception in honor of the scientific staff. 

 It will then proceed down the South American 

 coast to Buenos Ayres, Punta Arenas and 

 Ushushia, in Patagonia. Dr. Charcot will 

 visit Loubet Land, which he discovered in 

 1905, and from that point will proceed to 

 Alexander Land. 



A MEETING of the Geographical Society of 

 Philadelphia will be held at Witherspoon Hall 



at eight o'clock on Wednesday evening, No- 

 vember 4, when the program will be: 

 Annual address by the President: Mr. Alba B. 



Johnson. 

 " Movement for the Conservation of Natural Re- 

 sources": Mr. Emory E. Johnson. 

 " Report on the Ninth International Geographical 

 Congress " : Mr. Henry G. Bryant. 

 The program of the Forest Club of the 

 University of Nebraska for the first semester 

 of the academic year is as follows: 

 October 6 — " Poplars and their Importance " : Dr. 



October 20 — " Influence of Windbreaks " : C. R. 



Tillotson. 

 November 3 — " Forest Surveys " : Professor Sears. 

 November 17 — "Gypsy and Brown-tail Moths": 



Professor Bruner. 

 December 1 — " Germination of Forest Seed " : Mr. 



McNeel. 

 December 15 — " Forest Methods in the Rockies " : 



H. Stephenson and H. Greenamyre. 

 January 6 — " Problems in Forest Ecology " : Mr. 



Pool. 



At the recent meeting of the British Iron 

 and Steel Institute Professor E. D. Campbell, 

 of the University of Michigan, presented a 

 paper on the constitution of carbon steels. 

 According to an abstract in Nature he re- 

 viewed the efforts that have been made to 

 interpret the phenomena of the hardening and 

 tempering of steel in the light of the phase 

 rule. The analysis of the carbides obtained 

 from martensite and from troostite in his 

 laboratory appears to indicate marked disso- 

 ciation, ionic as well as molecular, in the 

 carbides from martensite, while the analysis 

 of the carbides obtained from troostite would 

 seem to indicate almost complete association 

 and polymerization of the dissolved carbides, 

 since the nitro-derivatives of the troostitic 

 carbides are as dark in color as those obtained 

 from equal amount of carbides derived from 

 pearline. These results would indicate the 

 probability that when martensite is heated 

 from 0° C. to 200° C. there is progressive as- 

 sociation of ionically dissociated carbides, and 

 polymerization of the carbides of lower molec- 

 ular weight into those of high molecular 

 weight. This polymerization of dissolved 

 carbides is apparently complete by the time 



