568 EXPEEIMENT STATION RECORD. 



1 kg. of dried potato, while 1.2 kg. of oats was not quite equal to 1 kg. of maize 

 or of dried potatoes. Potato flakes made a satisfactory feed for work horses. 



Dried yeast compared with meat meal for fattening swine, Richaisdsen 

 (Detit. Landw. Presse, 39 (1912), Nos. 5, pp. 42, 43; 6, pp. 49, 50).— On a ration 

 of potato flakes and meat meal the average gain per head and day for a period 

 of 9S days was 0.633 kg. (1.39 lbs.), at a cost of 76.4 pfennig (10.1 cts. ) ; on a 

 ration of potato flakes, dried yeast, and linseed meal the corresponding gain 

 was 0.587 kg., at a cost of 78.5 pfennig per kilogram. 



Pressed potatoes and potato fl.akes for fattening swine, H. Nex'^bauer et al. 

 (Bcr. Landiv. Rcichsaintc Inncrn, 1911, No. 23, pp. 105). — In a series of co- 

 operative feeding tests at 8 stations a combination of protein feeding stufl's 

 and potato products was fed to 166 pigs. The average gain per head and day 

 with pressed potatoes was 0.63 kg. and with potato flakes 0.59 kg. 



The hog book, H. C. Dawson {Chicago, 1911, pp. 414, pi. 1, figs. 52). — A prac- 

 tical treatise on breeding and raising swine, based on 50 years of experience in 

 handling hogs in the corn belt. There are also considerable data on the history 

 of swine breeding in the United States. The concluding chapter consists of 

 letters written by animal husbandmen of the state experiment stations to 

 illustrate the methods of feeding swine in the different sections of the United 

 States. 



Classification of the horse, P. Hicks (Amer. Breeders Mag., 2 {1911), No. 4, 

 pp. 254-259). — The author thinks that the domesticated horse is descended 

 from one species instead of several, as is commonly supposed. The characters 

 which distinguish the different species such as lumbar vertebrse, callosities, 

 color, and the articulation of the head and vertebra are regarded as so variable 

 that they are of little diagnostic value. Historical evidence is also presented. 



The Mongolian and the so-called Assyrian wild horse, H. Kraemer {Mitt. 

 Dent. Landw. GcselL, 21 {1912), No. 3, pp. 33-31, figs. 5).— The author fails to 

 find convincing evidence that the oriental horse is a descendant of Equiis prze- 

 tcalski, although future osteological study may provide a common ancestor for 

 both. 



Scale of points for Philippine pony {Philippine Agr. and Forester, 1 {1911), 

 No. 1, pp. 138, 139). — This is a scale of points used in teaching the classes in 

 animal husbandry of the Philippine College of Agriculture. 



Modern riding and horse education, N. Birch {Ncid York, 1912, pp. 301, pis. 

 25, figs. 8). — A popular work on equitation. Considerable attention is given 

 to the psychology of the horse and the evolution of the saddle. 



The psychology and training of the horse, S. von Maday {Psychologic des 

 Pfcrdes und dcr Drcssur. Berlin, 1912, pp. IX+349, figs. 1). — A treatise on the 

 mental characteristics of horses, based on our knowledge of the physiology of 

 the equine nervous system and sense organs. 



Clever Hans: A contribution to experimental animal and human psy- 

 chology, O. Pfungst, trans, by C. L. Rahn {Nexo York, 1911, pp. V 1+21 4, pl. 1, 

 figs. 15). — An account of experiments in testing the mental capacity of an 

 unusually intelligent horse, with a brief description of the methods by which he 

 had been trained. 



[Cost of raising a horse in Denmark] {Hoard's Dairyman, 43 {1912), No. //, 

 p. 148). — The different items given in this estimate of raising a horse in Den- 

 mark to the age of 2* years amount to a total of $121.50. 



Domestication and acclimatization of wild mammals, D. B. Lantz {Amer. 

 Breeders Mag., 2 {1911), No. 4, pp. 264-269). — The wapiti, white-tailed deer, 

 and native fur-bearing animals are among those mentioned as perhaps worthy 

 of breeding in captivity on a large scale. 



