May 2, 1913] 



SCIENCE 



669 



only to synonyms, but to related terms, and for 

 most of the new terms whicli hare appeared in 

 connection with analytic work the author's 

 name and the year, or in some cases the full 

 bibliographic reference is given. In addition 

 to this for many of the more important terms 

 the subject-matter consists not simply of a 

 definition, but of a short article of cyclopedic 

 character. For example, under " Correlation " 

 there are two pages of definitions, analysis, 

 references, etc., under " Erbformel " one page, 

 under " Experiment " almost five pages, under 

 " Faktor " two pages, under -" Heteromorph- 

 ose " more than two pages. " Potenz " has 

 nearly two pages, " Regeneration " nearly 

 three pages, " Eeiz " with compounds and ad- 

 jective terms six pages, " Vererbung " five 

 pages, etc. Each definition or article is 

 signed with the initial of its writer. 



Many terms consisting of substantive and 

 adjective and a considerable number which 

 consist of several words are included, e. g., 

 " adventive Bildungen " " erbgleiche Bas- 

 tarde," " funktionelle Hypertrophie," " onto- 

 genetisches Causalgesetz," " correlative Varia- 

 bilitat," " Gesetz der Concordanz der Zellteil- 

 ung," " Lage der Telle im Ei und Embryo," 

 " Lysintheorie der Entwicklungserregung." 

 The alphabetic arrangement of such terms in 

 the book does not follow any invariable rule, 

 but is determined by the most characteristic 

 word. 



Every student of " developmental mechan- 

 ics " is familiar with Professor Eoux's pioneer 

 work in the development of an analytic ter- 

 minology as well as in analytic investigation, 

 and it is of course to be expected that no in- 

 considerable portion of the book is devoted to 

 the terms of which he is the author. 



In general the book has a distinctly mor- 

 phological cast, as might be expected from its 

 title and its authors, but a considerable num- 

 ber of strictly physiological and some physical 

 and chemical terms are briefly defined. It 

 seems possible that in an eventual second edi- 

 tion some expansion along these lines may 

 perhaps be desirable. 



The following quotation from the preface 

 suggests how the book may be used not merely 



for reference, but as an introduction to the 

 subject : 



Wer diese Terminologie zu seiner Einfiihrung 

 in die En t wieklungsmechanik verwenden 

 will, dem ist zu empfelilen, der Reilie naeli mit der 

 Lektiire der Artikel : Entwicklung, Entwieklungs- 

 mechanik, Analyse, Differenzierung, Faktoren, De- 

 termination, Autoergie, Potenz, Lebewesen, Funk- 

 tionen, Wachstum, Anpassung, Perioden, Experi- 

 ment zu beginnen und die in jedem Artikel befind- 

 lichen Verweisungen zu benutzen. 



The publishers, the firm of Wilhelm Engel- 

 mann in Leipzig, have done their part in the 

 manner to be expected of them: the book is 

 convenient in form and size, the type is suffi- 

 ciently large for perfect ease in reading and 

 the typographic work is of the highest grade. 

 In a rather extended examination of the book 

 the reviewer has not noted a single typo- 

 graphical error. 



There can be no doubt of the value of the 

 book. It should be of great assistance to 

 clearness of thought and expression and should 

 decrease the number of new terms which have 

 no excuse for existence except their authors' 

 ignorance of terms already existing. It is to 

 be hoped that the book may be widely used by 

 experimental zoologists in this country as well 

 as in Germany. Q_ ]y;_ q 



Handhooh of Nature Study. By AiJNA Bots- 

 FORD CoMSTOCK. Oomstock Publishing Co., 

 Ithaca, N". T. 1912. Pp. xvii + 938, many 

 illustrations, mostly from photographs. 

 Wherever else the nature-study enthusiasm 

 may have subsided, it has not at Cornell nor 

 in New York. The principal reason for this 

 steadfastness is the presence and work at Cor- 

 nell of Mrs. Comstoek. She has had loyal 

 support from Professor Bailey, and effective 

 helpers in a half-dozen assistants and associ- 

 ates, but she it is who has been, and is, the 

 burning center of the Cornell nature-study il- 

 lumination. 



To make the rays reach farther Mrs. Corn- 

 stock has for twenty years issued the well- 

 known informing leaflets of the Home Nature- 

 Study Course, which have gone to thousands 

 of teachers and homes in New York. To make 



