ANIMAL PRODUCTION. §75 



daily, ate 355 lbs. of corn for KM) lbs. of gain, and gave a net profit of over 

 5 cts. each daily. 



"A summary of the [earlier] results, together with data from this bulletin, 

 indicates that the cost of feed to produce a 225-lb. market hog was $.3.35 per 

 100 lbs., aud that keeping the hog until it weighed 325 lbs. increased the cost 

 to $3.57 per 100 lbs. This includes only the cost of feed and does not include 

 the cost of labor, equipment, unusual risk, or interest on investment." 



The breeds of horses, C. G. AVrangel (Die Rassen den Pfcrdea. Stuittjart, 

 1909, vol. 2, pp. VII+J,!}G, pi. 1, figs. 81).— A treatise ou the origin, history, and 

 characteristics of the different breeds of horses throughout the world. A'ohmie 

 1 of this work has been previously noted (E. S. R.. 20, p. 75). 



The thoroug'hbred horse as a product of systematic selection, A. von Wein- 

 berg (Ber. Senckciib. Nattirf. (Ir.-tcU., //;? ( 1911), No. 2, pp. l'i5-17J,, figs. 2.'/).— A 

 study of the pedigrees of some foundation thoroughbred stock. 



A study of the Arab horse in northern Africa, F. Vatin (Etude sur le Cheval 

 Arahe daih9 le Nord de VAfriquc. Commercy, 1909, pp. XT +38, j)ls. 21). — A 

 popular account of the Arab horse in Morocco, Algeria, Tunis, Tripoli, and 

 Egypt. 



The Anglo-Norman horse, G. Rau (Arb. Dent, Landio. Gescll., 1910, Yo. 170, 

 pp. IX+12'i, pis. 15). — A history of this breed and its adaptability to Germany. 

 The pedigrees of the principal stallions now in service in Germany are apjiended. 



The most important breeding- lines of the Rhenish " cold bloods," .J. Fkizen 

 (Arb. Deut. Geseli. ZiicUtungsk., 1911, No. 9, pp. 69, tables 12, pis. //,'?). — A short 

 history of the breeding of heavy horses in Rhenish Prussia, with pedigrees of 

 some of the important breeding stock. 



Studies on the function of adaptation and anatomical and physiological 

 differences between the so-called *' warm " and " cold-blooded " horses. M. 

 MiJLLER (FiiJiling's Landic. Ztg., 60 [1911), No. 16, pp. 5-'io~562). — Measurements 

 were made of light and heavy horses and the internal organs were weighed after 

 slaughtering. 



The lung capacity of light horse.s, as determined by inflation, was less than 

 that of heavy horses, but in proportion to the weight of the animal was rela- 

 tively greater, and, as in earlier work (E. S. R., 22, p. 776), the author does not 

 agree with the findings of Lutzow (E. S. R., 21, p. 571). The lung tissue was of 

 finer structure and of greater elasticity in the light horses. The capacity of 

 the heart, as determined by Von Bohr's method, and the average weight of the 

 liver, spleen, and the amount of blood were also relatively but not absolutely 

 greater than in heavy horses. The actual hemoglobin content of the blood was 

 higher in light than in heavy horses. 



It is concluded that the thoracic organs of the light horse as a whole have a 

 relatively greater function of capacity. There is a discussion of the significance 

 of the angle of the different bones in the fore and hind limbs of diffei-ent types 

 of horses. 



Investigations on the relation between the cranial cavity, lung capacity, 

 and the thoracic cavity, K. Molthof (Untersuchungcn an Pferden iibcr dns 

 Verhdltnis der Kophohlen- sur Lnngenkapazitdt und Bennerkungcn iiber die 

 letztere im Verhdltnis sum Brustraum. Inaug. Diss., Univ. Bern, 1910, pp. 

 SI). — From measurements of 36 horses of different types the author concludes 

 that there is a correlation between the small head, small cranial capacity, and 

 large lung capacity. This is more pronounced in oriental tyi)es. There is no 

 correlation between lung capacity and weight <J¥ the lung. References to further 



Lwork on the subject are cited. 



