512 



SCIENCE. 



[N. S. Vol. XVI. No. 404. 



(10) Dr. W. B. FiTE: 'Concerning the com- 

 mutator subgroups of groups whose orders are 

 powers of primes.' 



(11) Dr. J. W. Young ; ' On a certain group 

 of linear substitutions and the functions belong- 

 ing to it ' ( preliminary report ) . 



(12) Professor Jacob Westlund: 'On the 

 class nvimber of the cyclotomic number field k 

 (e2«/p»).' 



(13) Professor L. E. Dickson: 'Announcement 

 of new simple groups' (preliminary communica- 

 tion ) . 



(14) Professor Alfked Loewt: ' Ueber die 

 Eeducibilitat der Gruppen linearer homogener 

 Substitutionen.' 



(15) Professor H. S. White: 'A special twisted 

 cubic with rectilinear directrix.' 



(16) Professor F. Morley: ' Ortliocenti'ie 

 properties of the plane n-line.' 



(17) Dr. ViEGiL Snyder: 'Forms of sextic 

 scrolls of genus greater than 1.' 



(18) Professor Peter Field: ' Quintic curves 

 for which p = l.' 



(19) Dr. C. J. Keyser: 'Concerning the line 

 and plane geometries of point four-space, and 

 allied theories.' 



( 20 ) Professor Arnold Emch : ' A linkage for 

 u = e iez.' 



(21) Dr. Edward Kasnee: 'The bilinear 

 point-line connex in space; an extension of 

 Clebsch's connex.' 



(22) Mr. E. A. Hook: 'Multiple points of 

 Lissajous's curves in two and three dimensions.' 



(23) Dr. L. P. EiSENHAET: 'Infinitesimal de- 

 formation of the skew helicoid.' 



(24) Professor John Eiesland: 'Null systems 

 in space of five dimensions.' 



(25) Professor E. D. Roe: 'Note on a partial 

 differential equation.' 



(26) Dr. Saul Epsteen: 'On integrability by 

 quadratures.' 



(27) Mr. W. B. Ford: 'On the possibility of 

 differentiating term by term the developments for 

 an arbitrary function of one real variable in terms 

 of Bessel functions.' 



(28) Professor T. F. Holgate: ' Apolar triads 

 on a straight line and on a conic' 



(29) Professor H. B. Newson: 'List of con- 

 tinuous groups of eollineations in space.' 



(30) Miss Helen Brewster: 'Group of col- 

 ■ lineations with invariant quadric surface.' 



(31) Professor Alexander Pell: 'On the 

 generalized Beltrami problem.' 



( 32 ) Professor L. Heffter : ' Ueber die Curven- 

 integrale im «!.-dimensionalen Raum.' 



The next meeting of the Society will be 

 held at Columbia University, October 25. 

 F. N. Cole, 

 Secretary. 



SOCIETY FOR THE PROMOTION OF AGRICULTURAL 

 EDUCATION. 



The Proceedings of the 22d meeting of the 

 Society, held in Pittsburgh, June 30 to July 2, 

 1902, is now in press and will contain the follow- 

 ing papers : ' The Promotion of Agricultural Sci- 

 ence,' by the President, Dr. W. H. Jordan, Director 

 New York Experiment Station, Geneva, N. Y. ; 

 ' Notes on the Poisonous Plants of Nebraska,' Dr. 

 G. E. Bessej'; 'The Individuality of Plants an 

 Important Factor in Plant Nutrition Studies,' 

 Professor E. B. Voorhees; ' Some Soil Problems 

 in the Dakotas,' Professor E. F. Ladd; 'The Re- 

 sults of Applying Crude Petroleum to Peach Trees 

 in Ohio to Suppress San Josfi Scale ' ( illustrated ) , 

 F. M. Webster ; ' The Available Energy in Timothy 

 Hay' (illustrated). Dr. H. P. Armsby: 'The 

 Composition of the Combustible Gases Excreted 

 by Cattle,' J. A. Fries; 'The Statistics of the 

 Dairy,' Maj. H. E. Alvord; 'The iEcidium as a 

 Device to Restore Vigor to the Fungus,' Dr. J. C. 

 Arth ur ; ' Crude Petroleum as an Insecticide,' Dr. 

 E. P. Felt ; ' Views of a Country Roadside ' ( illus- 

 trated). Dr. W. J. Beal; (1) 'The Use of the 

 Centrifuge in Diagnosing Disease of the Cereal 

 Grains,' ( 2 ) ' Preliminary Notes on a Contin- 

 uous Process of Disinfecting Seed Grain with 

 Formaldehyde Vapor' (illustrated). Professor H. 

 L. Bolley ; ' Some Variations in Introduced Gar- 

 den Vegetables,' H. C. Irish ; ' Plant Depredations 

 and Plant Culture,' Professor F. W. Rane; 'The 

 Mushrooms of Iowa, their Chemical Composition 

 and Food Value,' Dr. J. B. Weems : ' Soil Bac- 

 teriology,' Professor F. B. Chester; 'The Relation 

 of the Water Control of Certain Plants to their 

 Hardiness,' Professor W. R. Lazenby ; ' The Im- 

 portance of Considering Previous Environment 

 in Conducting Variety Tests,' Professor T. L. 

 Lyon ; ' Observation on Manure Sampling,' Dr. 

 William Frear. 



The next meeting of the society will be 

 held in "Washington, D. C, in connection with 

 the American Association for the Advance- 

 ment of Science, during the first week in 

 January, 1903. 



F. M. Webster, 



Secretary. 



