Januakt 24, 1919] 



SCIENCE 



85 



ing list of Kansas reptiles and batrachians, 

 which, however, have not been printed. In 

 entomologry, he was an authority on tiger 

 beetles (Cieindelida;) having brought together 

 an excellent collection of them during his 

 travels in various parts of the United States 

 from the Rocky Mountains eastward. 



A voracious and consistent reader along his 

 special lines, he compiled from world-wide 

 sources, during his fourteen years of service 

 with the Biological Survey, a vast amount of 

 information, now carded in his own hand- 

 writing in the files of the bureau, supple- 

 mentary to the results of his experimental 

 work. He wrote as freely as he read, setting 

 forth facts on the printed page in a clear, 

 graceful and interesting style. His numerous 

 papers on economic zoology are well known to 

 farmers and agricultural students in every 

 state in the Union. 



The personality of Professor Lantz was 

 kindly and endearing. In field and office 

 alike his gentle humor, patience and industry 

 were an inspiration to his associates, to whom 

 he was ever a cheerful friend and valued 

 counsellor. Ned Dearborn 



PROFESSOR LUDVIG SYLOW 



The Nestor of Norwegian mathematicians, 

 Professor Ludvig Sylow, of Christiania, died 

 on September 7, 1918, at the age of eighty- 

 five years. He was known to the mathe- 

 maticians of every civilized country on ac- 

 count of a well-known theorem which bears 

 his name. In 1876 Frobenius remarked that 

 " as every educated person knows the Pytha- 

 gorean theorem so does every mathematician 

 speak of Abel's theorem and of Sylow's 

 theorem." 



In view of the general interest in the re- 

 tirement of university professors at sixty-five 

 it may be worth noting that Sylow was ap- 

 pointed professor of mathematics in the Uni- 

 versity of Chritiania after reaching the age 

 of sixty-five years. While various other noted 

 European mathematicians were called to uni- 

 versity positions after they had spent years in 

 teaching in secondary institutions, Sylow was 



perhaps the only one among them who devoted 

 forty years to teaching in a secondary institu- 

 tion before securing a imiversity chair. 



Notwithstanding the advanced age at which 

 Sylow entered the imiversity faculty he is 

 said to have filled the position during twenty 

 years with marked success. The duties of his 

 professorship did not seem to be burdensome 

 to him until the last year of his life when he 

 frequently remarked that he felt tired. 



In 1883 he was elected a member of the 

 Academy of Sciences of Grottingen and in 

 1894 he received an honorary doctor's degree 

 from the University of Copenhagen. His 

 writings related mostly to the theory of sub- 

 stitution groups and to the works of his 

 great countrymen Abel and Lie. He wrote, 

 however, also on the theory of equations and 

 on the complex multiplication of elliptic 

 functions. 



G. A. Miller 



SCIENTIFIC EVENTS 



THE BRITISH GLASSWARE INDUSTRY 



An article in Nature states that the British 

 Chemical Ware Manufacturers' Association, 

 the British Flint Glass Manufacturers' Asso- 

 ciation, the British Lamp-'blown Scientific 

 Glassware Manufacturers' Association and the 

 British Laboratory Ware Association- — organi- 

 zations representing the manufacture and dis- 

 tribution of scientific glassware — have jointly 

 addressed the Inter-Departmental Glass Trades 

 Committee, representing the Board of Trade 

 and the Department of Optical Munitions and 

 Glassware Supply (Ministry of Munitions), 

 setting forth their views as to steps which 

 should be taken to secure the permanent estab- 

 lishment of the trade in Great Britain. They 

 point out that in 1914 the shortage of scientific 

 glassware threatened disaster. Industries such 

 as agriculture, food production of all kinds and 

 the manufacture of armaments, iron and steel, 

 non-ferrous metals, gas, dyes, explosives, 

 leather and oil, also the military and civil med- 

 ical services and the public services responsible 

 for public health and hygiene, which could not 

 be conducted without effi.cient scientific con- 

 trol, were in danger. The " master key " to the 



