892 



SCIENCE. 



[N. S. Vol. XXI. No. 545. 



The second volume, the printing of which 

 has been begun, will appear in the near future 

 and conclude this most important contribu- 

 tion of the working student of vegetable 

 physiology. Rodney H. True. 



BuKEAU OF Plant Iotustby, 



U. S. Depabtmext of Agbicultuee. 



SCIENTIFIC JOURNALS AND ARTICLES. 

 The American Naturalist for May brings 

 this journal up to date. It contains articles 

 on the ' Affinities of the Genus Equisetum' 

 by D. H. Campbell ; ' Movements of Diatoms 

 and Other Microscopic Plants,' by D. D. Jack- 

 son, and, after a long interval, another of the 

 valuable ' Synopses of North American In- 

 vertebrates, XX., Families and Genera of 

 Araneida,' by Nathan Banks ; ' Biology of 

 Acmoea testudinalis Milkr,' M. A. Willcox; 

 ' Habits of the West Indian Whitebait,' A. H. 

 Clark, and notes and reviews. 



The May number (volume 11, number 8) of 

 the Bulletin of the American Mathematical 

 Society contains: Report of the February 

 meeting of the San Francisco Section, by G. 

 A. Miller ; ' On the development of mathe- 

 matical analysis and its relation to certain 

 other sciences,' by Emile Picard (St. Louis 

 address), translated by M. W. Haskell; 'On 

 the class of the substitutions of various linear 

 groups,' by L. E. Dickson ; ' Note on a problem 

 in mechanics," by A. M. Hiltebeitel ; ' A geo- 

 metric construction for quaternion products,' 

 by Irving Stringham; Reviews of Lechalas's 

 Geometric generale, by Oswald Veblen; Net- 

 to's Elementare Algebra, by J. H. Tanner; 

 Murray's Infinitesimal analysis, by W. B. 

 Fite; Tanner's Elementary algebra, by James 

 Pierpont; Annuaire du Bureau des Longi- 

 tudes, by E. W. Brown; Gibbs-Roy's Dia- 

 grammes et surfaces thermodynamiques, by 

 W. F. Durand; 'Notes'; and 'New Pub- 

 lications.' 



SOCIETIES AND ACADEMIES. 

 THE MICHIGAN ACADEMY OF SCIENCE. 



The annual meeting of the Michigan Acad- 

 emy of Science took place at Ann Arbor, 

 March 30, 31 and April 1. The programs of 



papers were good, and the meetings well at- 

 tended by members and others from all parts 

 of the state. On the evening of March 30 

 the annual address was delivered in L'niversity 

 Hall before an audience of two thousand by 

 Professor T. C. Chamberlin, of the University 

 of Chicago, the topic being ' Old and New 

 Hypotheses of the Earth's Origin.' The 

 evening of the thirtieth was spent in a social 

 smoker tendered by the University Research 

 Club; and the excellent address of the retiring 

 president of the academy. Dr. A. C. Lane, 

 state geologist of Michigan, was delivered the 

 afternoon of April 1, the topic being ' Natural 

 Resources, their Conservation and Compensa- 

 tion for Necessary Consumption, one Feature 

 of which is a Scientific Search for Substi- 

 tutes.' 



The academy has had introduced into the 

 state legislature a bill for a topographic sur- 

 vey, and another bill for a natural history 

 survey. The prospect for the passage of these 

 bills seems good, and the academy decided to 

 engage in a vigorous campaign to effect that 

 end. 



Papers were read as shown by the following 

 programs : 



SECTIOX OF AGBICCLTUBE. 



Vice-Pregident, W. J. Beal, Agricultural College. 



liENTON L. BuTTEBFiELD, president of State 

 Agricultural College, Rhode Island: 'Outline of 

 a Course in Rural Sociology.' 



W. O. Hedeick, Agricultural College: 'Syllabus 

 for an Elementary Course in Economics.' 



R. S. Shaw, Agricultural College: ' Syllabus for 

 a Four-year Course in Live-stock Husbandry.' 



U. r. IIedbick, Agricultural College : ' Syllabus 

 for a Four-year Course in Horticulture.' 



J. L. SxYDEB, president of Agricultural College: 

 ' Social Phases of Agricultural Education.' 



U. P. Hedbick, Agricultural College : ' Outline 

 of Topics in Horticulture for some Grades of Com- 

 mon Schools.' 



Clabence E. Holmes, superintendent of State 

 School for Blind, Lansing: 'The Place of Agri- 

 culture in the Rural Scliools.' 



F. L. Keeleb, Mt. Pleasant: 'School Gardens.' 



J. B. Dande>"0, Agricultural College: 'Some 

 Experience in the Management of School Gardens.' 



Ebxest Bubnham, Kalamazoo: 'The Prepara- 

 tion of Teachers for the Rural Common Schools.' 



