558 . Scientific Intelligence. 



not set out to write a text-book but an up to date book of 

 reference. w. b. 



10. Algebra for Beginners ; by C. Godfrey and A. W. Sid- 

 dons. Pp. xi, 272. New York, 1912 (G. P. Putnam's Sons) 

 Cambridge (University Press). — The work of experienced teachers 

 who have devised very ingenious and useful methods for present- 

 ing the elementary processes of algebra in a way to bring convic- 

 tion to the mind of a child without any attempt at formal 

 reasoning. Especially happy are the inductive processes of 

 explaining the nature and method of formation of an algebraic 

 equation and of developing the subject of the graph. The exer- 

 cises are fresh and numerous and full of local color. w. b. 



11. Tables and other Data for Engineers and Business Men ; 

 compiled by Charles E. Ferris. Pp. 169. Published by Uni- 

 versity Press, Knoxville, Tenn. 1912. — The object of this 

 manual, as stated in the preface, is " to secure a medium whereby 

 we may bring before the minds of the men who control the 

 affairs of the South the strongest possible arguments in favor of 

 technical education as a means of developing our undeveloped 

 resources." There must be other means of effecting this important 

 purpose which would appeal more powerfully than a set of tables 

 to the leaders of industry, but this involves no expense. w. b. 



12. Snyder and Hutchinson 's Elementary Text-booh on the 

 Calculus; by Virgil Snyder and John Irwin Hutchinson. 

 12mo, pp. 384. New York, 1912 (American Book Co.). — 

 Intended to present the calculus in as simple and direct a form as 

 is possible consistently with accuracy and thoroughness. While 

 intended primarily for students in engineering and science, ib 

 meets the requirements of all beginners in the calculus equally 

 well. There is a refreshing absence of the superfluities often 

 noticed in elementary text-books which strive for a degree of 

 rigor which the student cannot appreciate until practice has made 

 him acquainted with the subject. w. b. 



13. The Science Reports of the Tdhoku Imperial University, 

 Sendai, Japan. — The Tohoku University established in 1912 a 

 series of Science Reports, of which several numbers have already 

 been issued. The librarian of the University, Professor T. 

 Hayashi, is chairman of the publication committee. Two Series 

 have been inaugurated ; one of the numbers now in hand of the 

 First Series contains an interesting paper by Mr. Katayama on 

 the nature of atomic weight ; another by Mr. Kobayashi on the 

 composition of the remarkable uranium mineral called thorianite. 

 The author finds two varieties, one containing 78 per cent of 

 thorium oxide and 15 per cent of uranium oxide, the molecular 

 ratio of Th0 2 to UO Q being closely 6:1. The second kind con- 

 tains 60 per cent and 33 per cent respectively, with the ratio of 

 2 : 1. The first number of the Second Series (in quarto form) is 

 devoted to geology and gives a paper on the lime algae of Japan 

 and China by H. Yabe. 



14. Bibliotheca Zoologica II. Verzeichniss der Schriften ilber 

 Zoologie welche in den periodischen Werken enthalten und vom 



