Mat 19, 1911] 



SCIENCE 



111 



88). Some may take this to mean tliat "the 

 conduct of life " may still be considered (e. g., 

 ethically or " philosophically ") apart from 

 science, and, conversely, that science may still 

 have an aspect (e. g., the pursuit of truth) that 

 is independent of the conduct of life. 



The author's captivating style is too well 

 known to call for comment. The publishers 

 have given the book a very attractive form. 

 A. W. Moore 



Allen's Oommercial Organic Analysis. Vol- 

 ume IV., Eesins, India-rubber, Gutta- 

 percha and Essential Oils. Philadelphia, 

 P. Blakiston's Son and Co. Pp. viii + 466. 

 $5.00 net. 



The subjects covered in this volume are : 

 Resins, by M. Bennett Blackler ; India-rubber, 

 Rubber Substitutes and Gutta-Percha, by E. 

 W. Lewis; Hydrocarbons of Essential Oils, 

 by T. Martin Lowry; Ketones of Essential 

 Oils, by T. Martin Lowry; Volatile or Essen- 

 tial Oils, by Ernest C. Parry; Special Char- 

 acters of Essential Oils, by Henry Leffmann 

 and Charles H. LaWall. 



As with the previous volumes of the series, 

 the book contains a very large amount of 

 detailed information which is very valuable 

 for any one who has occasion to work with 

 the great number of organic compounds which 

 are used in industry. The preparation of the 

 successive chapters by chemists who have ex- 

 pert knowledge of the subjects of which they 

 write insures accuracy and a wealth of in- 

 formation which it would be impossible to 

 secure in any other way. 



W. A. Notes 



SCIENTIFIC JOURNALS AND ARTICLES 



The April number (volume 12, number 2) 

 of the Transactions of the American Mathe- 

 matical Society contains the following papers : 



Anna J. Pell: " Biorthogonal systems of func- 

 tions. ' ' 



Anna J. Pell: "Applications of biorthogonal 

 systems of functions to the theory of integral 

 equations. ' ' 



C. N. Moore : ' ' On the uniform convergence of 

 the developments in Bessel functions. ' ' 



H. H. Mitchell: "Determination of the ordinary 

 and modular ternary linear groups. ' ' 



G. D. Birkhoff: "General theory of linear dif- 

 ference equations." 



The April number (volume 17, number 7) 

 of the Bulletin of the American Mathematical 

 Society contains : " Groups generated by two 

 operators satisfying two conditions," by G. A. 

 Miller ; " Fundamental regions for cyclical 

 groups of linear fractional transformations on 

 two complex variables," by J. W. Young; 

 " On the relative discriminant of a certain 

 Kummer field," by Jacob Westlund ; " Note 

 on reciprocal figures in space," by Peter 

 Field ; " Mathematical physics for engi- 

 neers," review of Gans' Einfiihrung in die 

 Theorie des Magnetismus, Schaefer's Einfiihr- 

 ung in die Marwellsche Theorie, and Jahnke 

 and Emde's Funktionentafeln und Curven, by 

 E. B. Wilson; "Shorter Notices": Hunting- 

 ton's Fundamental Laws of Addition and 

 Multiplication in Elementary Algebra, by N. 

 J. Lennes; Borel's Theorie de la Croissance, 

 by R. D. Carmichael; Tannery's Elements 

 der Mathematik, by J. B. Shaw; Weitzen- 

 bock's Komplex-Symbolik, by C. L. E. Moore; 

 Staude's Analytische Geometrie des Punkte- 

 paares, des Kegelschnittes und der Flache 

 zweiter Ordnung, by D. D. Leib; Festschrift 

 zur Feier des 100 Geburtstages Edouard 

 Kummers, by L. E. Dickson; Thiele's Inter- 

 polationsrechnung, by H. L. Rietz; Slaught 

 and Lennes's Plane Geometry, by F. W. 

 Owens; Breckenridge, Mersereau and Moore's 

 Shop Problems in Mathematics and Lester's 

 Integrals of Mechanics, by C. F. Craig; An- 

 nuaire du Bureau des Longitudes, by E. W. 

 Brown; De Montessus' Legons elementaires 

 sur le Calcul des Probabilites, by E. B. Wil- 

 son ; " Notes " ; " New Publications." 



The May number of the Bulletin contains : 

 Report of the February meeting of the so- 

 ciety, by F. N. Cole ; " On the classification of 

 crystals," by Paul Saurel ; " Horner's method 

 of approximation anticipated by Ruffini," by 

 Florian Cajori; Review of the New Haven 

 Colloquium Lectures, by G. D. Birkhoff; 

 " Shorter Notices " : Bauer's Vorlesungen 



