ANIMAL PRODUCTION. 867 



interesting to study the organic matter in the expired breath in health and 

 disease; in different ages, etc. . . . 



"The fact that the expired breath contains definite amounts of specific 

 organic substances will also have an immediate bearing upon the problems of 

 ventilation and the effects of vitiated air. There has recently been a growing 

 tendency to regard the ill effects of vitiated air as due to the increased tem- 

 perature and moisture, but it is now apparent that there are other factors 

 which must be taken into account." 



A respiration calorimeter of the Atwater- Rosa-Benedict type designed for 

 use with dogs and children; with demonstration, IT. B. Williams {Proc. Soc. 

 Expt. Biol, and Med., 8 {1911), No. S, p. 61).— A brief account of the comple- 

 tion of a respiration calorimeter of suitable size, and with special modifica- 

 tions, for the study of the gaseous exchange and energy metabolism of infants 

 and small animals. 



Origin and development of the nutrition investigations of the OflB.ce of 

 Experiment Stations, C. F. Langworthy (U. S. Dept. Agr., Office Expt. Stas. 

 Rpt. 1910, pp. Ji'i9-'i60). — Early nutrition work in the United States Is consid- 

 ered as well as the origin of the nutrition work of this Department, its scope, 

 the number and character of the publications which haAe been issued, and the 

 practical results of the investigations. 



ANIMAL PRODUCTION. 



Lectures on biology, C. Thesing, trans, by W. R. Boelteb (London, 1910, 

 pp. rill+33ff; rev. in Nature [London], 86 {1911), No. 2172, pp. 510, 511).— 

 This is a translation of a German work (Biologische Strelfziige), which is a 

 modern presentation of the biological investigations on variation, heredity, and 

 adaptation, with a discussion of their value from ihe standpoint of philosophy. 



Parthenogenesis, A. Li^caillon {Bui. Sci. France et Belg., Ii'f {1910), No. 3, 

 pp. 235-237). — A discussion of natural rudimentary parthenogenesis, total par- 

 thenogenesis, and studies of experimental parthenogenesis in different species of 

 animals. A bibliography is appended. 



On germinal transplantation in vertebrates, W. E. Castle and J. C. Phil- 

 lips {Carnegie Inst. Washington Piih. I'f.'i, 1911, pp. 26, pis. 2). — This contains 

 further details (E. S. R.. 21, p. 669) on transplanting undeveloped ovaries in 

 guinea pigs and rabbits and of testicles in rats. In the guinea pigs there were 

 2 cases where young were produced from the grafted tissue. The influence of 

 the foster mother was negative in one case, and the other case was rejected 

 because the apparent positive evidence can be accounted for as a recessive 

 character. 



The authors review the work of other investigations on ovarian and testicular 

 transplantation (E. S. R., 24, p. 576) in poultry, mammals, and human beings. 



A bibliography is appended. 



On evidence of some influence on offspring from engrafted ovarian tissue, 

 C. C. Guthrie {Science, n. ser., 33 {1911), No. 856, pp. 816-819) .—A discussion 

 of the work of Castle, noted above. 



The transplantation of ovaries in chickens, C. B. Davenport (Jour. Morph., 

 22 {1911), No. 1, pp. 111-122). — The author performed 6 experiments in remov- 

 ing ovaries of hens and transplanting them to dissimilar hens, but found no 

 evidence that the engrafted ovary ever became functional, as the more or less 

 completely extirpated ovary regenerated and produced an abundance of eggs. 

 There was no noticeable effect on the soma of the foster mother by the intro- 

 duced germ plasm. 



