58 



SCIENCE. 



[N. S. Vol. IX. No. 211. 



(3) Professor Aeihue S. Hathaway: 'A new 

 ■way of presenting the priDciples of the calculus.' 



(4) Professor H. Masciike : 'Some general the- 

 orems concerning linear substitution-groups of 

 finite order.' 



(5) Professor E.H.Moore: 'Concerning Klein's 

 groups of n! (n — l)-ary collineations.' 



(6) Professor E.H.Moore: ' The decomposition 

 of a modular system connected with the doubly 

 generalized Fermat theorem.' 



(7) Professor H. B. Newson : 'Normal forms of 

 projective transformation (second communica- 

 tion).' 



(8) Professor H. B. Newson : 'A new solution 

 of the Riemann-Helmholtz problem.' 



(9) Professor H. B. Newson : 'What constitutes 

 a continuous group ?' 



(10) Professor James B. Shaw: 'Some quater- 

 nion integrals and their related classes of func- 

 tions.' 



(11) De. H. F. Stecker : 'Non-Euclidean images 

 of plane cuhics on rotation surfaces of constant 

 negative curvature.' 



(12) Professor Henry S. White: 'Note on cer- 

 tain relations among fundamental covariants of 

 a ternary cubic' 



(13) Professor J. W. A. Young : 'The teaching 

 of mathematics in the higher schools of Prussia. ' 



F. N. Cole, 



Secretary. 

 Columbia University. 



GENERAL 3IEETING OF THE AMERICAN 

 CHEillCAL SOCIETY. 



The eigliteenth general meeting of the 

 American Chemical Society was held in 

 New York on the 27th and 2Sth of Decem- 

 ber, and was in every respect a most suc- 

 cessful and notable gathering. 



The opening session was held at the rooms 

 of the Chemists' Club, 108 West 55th Street, 

 with an attendance of about one hundred 

 and fifty members and visitors. 



Dr. McMurtrie welcomed the visitors and 

 then introduced Mr. Randolph Guggen- 

 heimer. President of the Council, who wel- 

 comed the Society to the city. Professor 

 Alexander S. Webb, of the College of the 

 City of New York, welcomed the Society to 

 the educational and scientific institutions 

 of the city. President C. E. Munroe re- 



sponded in behalf of the Society, after which 

 the following papers were read : 



' A New Method for the Separation of 

 Arsenic, Antimony, Selenium and Tellu- 

 rium from one another and from other 

 Metals,' A. E. Kuorr ; ' Separation of Im- 

 purities in the Electrolytic Eefining of Cop- 

 per,' by P. de P. Eicketts ; ' The Prepara- 

 tion of Metallic Tellurium,' Victor Lehner. 



The meeting was then adjourned to take 

 a special train to the New Jersey Zinc and 

 Iron Company's works at Newark, N. J., 

 where a luncheon was served, and the pro- 

 cess of manufacture of zinc oxide was 

 shown. Parties were also made up to visit 

 the Wetherill Concentrator Works, Murphy 

 Varnish Company, Lister's Agricultural 

 Chemical Works and others. 



In the evening a business session was 

 held at the club rooms, at which reports 

 were received from standing committees 

 and the retiring President made his ad- 

 dress. M. Raoul Pictet gave an interesting 

 discourse on the ' Retardation of Chemical 

 Activities at Low Temperatures.' His sub- 

 ject was illustrated by a lantern projection 

 showing a piece of metallic sodium held on 

 a steel needle and both immersed in hydro- 

 chloric acid which had been cooled to the 

 lowest temperature obtainable by means of 

 solidified caibon dioxide. There was no 

 reaction between acid and sodium or the 

 iron until a considerable rise of temper- 

 ature had taken place. 



The second day's session was held at 

 Havemeyer Hall, Columbia University, at 

 which the following papers were read : 



' Measurement of Turbidity in Water,' 

 AV. P. Mason ; ' Tiie Assay of Nux Vomica,' 



E. R. Squibb ; ' The Potato and Cassava 

 Starch Industries in the United States,' H. 

 W. Wiley; 'Notes on the Estimation of Car- 

 bohydrates,' Traphagen and Cobleigh ; ' The 

 Action of Iodine on the Fatty Amines,' J. 



F. Norris ; ' On the Constitution of Some 

 Canadian Baryto-Celestites, C. W. Volney ; 



