i 3 o 



THE QUARTERLY REVIEW OF BIOLOGY 



"The recessive so formed may also vary in simple 

 fission if one of its recessive allelomorphs is not pure 

 but is loaded with a fragment of the dominant factor. 

 It may then vary in two directions — by increasing, 

 or decreasing, this fragment." 



TILLOTSONS DIRECTORY OF PEDI- 

 GREE STOCK BREEDERS AND YEAR 

 BOOK OF THE BREEDING INDUSTRY. 



An Index of Pedigree Stock Breeders and Owners 

 in England, Wales, Scotland, Ireland, and 

 the Channel Islands; Australia, New Zealand, 

 British South Africa and Canada; and Year 

 Book Concerning Breeds and Events in the 

 Breeding Industry in Various Countries. 

 Compiled and Edited by R. de Toll. 



Tillotsons Publishing Co. 

 £i. 15s. 7! x 8f ; 812. London 



The general scope of this useful work is 

 sufficiently indicated by its title. Some of 

 the numerous special articles in the volume 

 are of real interest and value to the student 

 of genetics, as are also the excellent photo- 

 graphic illustrations of breed types. It is 

 a pity that the live-stock industry of this 

 country has no annual of similar scope. 



GENETICS IN RELATION TO AGRI- 

 CULTURE. 

 By Ernest B. Bab cock and Roy E. Clausen. 



McGraw-Hill Book Co., Inc. 

 $5 .00 5I x 9; xiv + 673 New York 

 This is the second edition, revised nearly 

 to the point of complete rewriting, of 

 what has come to be regarded as, on the 

 whole, the best existing text book of 

 genetics for teaching purposes. Its high 

 reputation will be enhanced by its present 

 form. 



LE PROBLEME DES TRANSFORMA- 

 TIONS DES ETRES VIVANTS RESOLU 

 EXPERIMENTALEMENT. La mutation 

 provoquee. Le mecanisme des mutations spon- 

 tanees. La variabilite her edit aire des indi- 

 vidus et la fixite des especes. Nouvelles 

 donnees de philosophie scientifique. 

 By L. Remy. Gaston Doin et Cie 



10 francs 4! x 7; vii + i6z (paper) Paris 

 Mademoiselle Remy furnishes in this 

 book a brief, popular resume of some of 

 the elementary facts of modern genetics, 

 Mendelian, mutation, etc. The results 

 of some crossing experiments with peas 

 are presented. 



GENERAL BIOLOGY 



INSTINCT IN THE CELL AND ORGAN- 

 ISM. A Genetic Account of the Primal 

 Urges, Impulses and Reactivities of Living 

 Organisms. With Special Reference to the 

 Evolutionary Development of the Human Psy- 

 chic Life. In three Parts: I. The Instinctive 

 Functionings of the Cell. II. The Genetic 

 Development of the Psychic Powers. III. 

 Instinct in the Development of the Social Life. 

 By Neander P. Cook. The Weimer Press 



$5 .00 6x9!; xii -f- Z44 Alhambra, Calif. 

 We are told in a four page abstract (sold 

 for 10 cents) which accompanies this book 

 that: "Probably no book of recent years 

 contains such far-reaching new conceptions 

 of fundamental importance in Biology." 

 This naturally suggests turning the book 

 over to Reginald the Office Boy for his 

 tender ministrations. But before doing 

 so we took the trouble to read it. As a 

 result we are not quite so sure that the 

 bold asseveration quoted has not got some 

 element of truth in it. The author seems 

 clearly to fall under Augustus DeMor- 

 gan's definition of a paradoxer. But if 

 one neglects certain developments of the 



