70 Scientific Intelligence. 



be accomplished the work will have to be continued beyond the 

 limits of the present appropriation. . . . The German discovery- 

 was made only after live years' work in a single shaft, and it 

 would be hardly reasonable to expect immediate results in this 

 country." 



III. Miscellaneous Scientific Intelligence. 



1. Heredity in Relation to Evolution and Animal Breeding y 

 by William E. Castle. Pp. xii, 184, with many illustrations 

 and diagrams. New York, 1911. (D. Appleton and Company.) 

 — At a time like the present, when new discoveries in genetics 

 are being made with such bewildering rapidity tbat it is almost 

 impossible for the layman to realize the significance of the vast 

 amount of accumulated data, it is important that a popular sum- 

 mary should be made occasionally, showing exactly what the 

 actual advance in the science has been. No one in this country 

 is better fitted by his experience in experimental breeding to 

 discuss this matter than the author of this attractive little book, 

 and he has succeeded admirably, with the aid of well-chosen 

 illustrations and diagrams, in his attempt to present in a manner 

 intelligible to the general reader the essential principles involved 

 in the hereditary processes, and their significance in the breeding 

 and improvement of races of plants and animals. The work is 

 naturally based upon the applications of Mendel's law of heredity 

 to the inheritance and evolution of characters, including the 

 effects of inbreeding and the inheritance of sex. w. r. c. 



2. Animal Intelligence : Experimental Studies y by Edward 

 L. Thorndike. Pp. viii, 297. New York, 1911 (The Macmil- 

 lan Company). — The Publication of Thorndike's studies on the 

 Associative Processes in Animals (in the Phychological Review, 

 1898) may be said to have inaugurated in this country the study 

 of animal intelligence and behavior by exact experimental meth- 

 ods. This paper was followed by others on the Instinctive 

 Reactions of Young Chicks, the Phychology of Fishes, and the 

 Mental Life of the Monkeys. These studies have been reprinted 

 in this book, and to them have been added essays on the Laws 

 and Hypotheses of Behavior and the Evolution of the Human 

 Intellect. Not only will the collection of these papers and their 

 publication in accessible form be appreciated by all students of 

 animal behavior, but the articles are in themselves well adapted 

 to form the chapters of a book of general interest. w. r. c. 



3. The Parasitic Amoebce of Man y by Charles F. Craig. 

 Published with the authority of the Surgeon General of the 

 L^nited States Army. Pp. x, 253 ; 30 figures. Philadelphia, 

 1911 (J. B. Lippincott Company). — For a number of years it 

 has been generally known that some of the more serious human 



