670 EXPERIMENT STATION EECOKD. 



'■ TLe ventilation power is nuicli greater in tlie younj;- student tlian in the 

 middle-aged. . . . 



'■ Oxygen inlialation enables the athlete to excel by making him able to stand 

 a higher tension of CO^. After deep breathing of oxygen and filling his lungs 

 with the gas he can run 200 to 300 yds. without breathing, and this gives him a 

 mechanical advantage. The beneficial effect is due partly to the oxygen in the 

 body, and chiefly to that in the lungs. 



" The effect of oxygen inhalation is almost entirely spent by the first period 

 of exertion which follows the inhalation." 



Select list of references on the cost of living and prices, H. H. B. Meyer 

 (Washington: Library of Congress, 1910, pp. V-\-107). — This is a list of the 

 literature of the subject contained in the Library of Congress, relating princi- 

 pally to conditions in the United States, although all important foreign countries 

 are represented. 



ANIMAL PRODUCTION. 



Text-book of comparative physiology of domesticated animals, W. Ellen- 

 BERtiER and A. Scheunert (Lehrhuch iter vergleichendeu Physiologie dcr Haus- 

 siiugcticrc. Berlin. HUG, pp. X-\-S()'.). figs. .'/7J). — This text-boot has special value 

 for teachers and investigators in animal husbandry through its resumes of 

 recent work. Among the more important chapters are the follcnving: The 

 Chemical Constituents of the Animal Body, by A. Scheunert ; Ferments and 

 Their Effect in General, by W. Grimmer; The Blood, by H. Zangger and O. 

 Zietzschmann ; Circulation of tlie P.1o(h1, by A. Lohmann; Respiration, by TV. 

 Gmelin; Urine and its Secretion, by C. Porcher; Secretions of the Skin, by 

 "W. Kolmer; Milk and its Secretion, by H. Rievel ; Special Secretions, by W. 

 Hausmann ; Functions of the Liver, by E. Abderhalden ; Digestion, by W. Ellen- 

 berger and A. Scheunert ; Assimilation and Resorption, by W. Gmelin ; Metab- 

 olism, by O. Krnmmacher; Animal Heat, by J. Tereg; General Physiology of 

 JIuscles and Nerves, by A. Durig; Electrophysiology, by A. von Tschermak; 

 Special Physiology of the Nerves, by H. Dexler ; Locomotion, by O. Zeitzschmanu ; 

 Sense Organs, by W. Ellenberger; Vision, by A. von Pflugk; and Reproduction, 

 by W. Ellenberger. 



The treatise also furnishes a foundation for work in applied zoology. Experi- 

 mental methods are described and there are numerous references to the literature 

 on comparative physiologj-. 



A theory of Mendelian phenomena, W. J. Spillman {Amer. Breeders" Mag., 

 J (1910), No. 2, pp. 113-125). — The epigenetic theory of the development here 

 outlined is stated to be consistent with JNIendelian phenomena and is a restate- 

 ment of the author's views, which have been noted from another source (E. S. R., 

 23, p. 172). 



The new views about reversion, C. B. Davenport (Proe. Amer. Plril. Soc., 

 Ji9 (1910), \o. 196, pp. 291-296). — Atavism is defined as the possession in an 

 offspring of a graudpareutal trait not evident in the parent, while reversion is 

 the reappearance of a trait of some more remote ancestor. The new explana- 

 tion of reversion is based on the principle that unit characters are inherited 

 from the germ plasm and not from the parent as a whole. 



" In the great majority of cases atavism is a simple reappearance in one- 

 fourth of the offspring of the absence of a character due to the simplex nature 

 of the character in both parents. 



"Reversion in the strict sense has a more complicated oxplanation. If de- 

 pends in general on the cii'cumstance that many apparently simple organs or 

 color patterns or colors are really complex and require the cooperation of two 

 or more elementary characteristics called factors. For generations a particular 



