ANIMAL PKODUCTION. 67 



In actual iiedigreo work ihe method of calculation consists in delerminiu^ the- 

 primary reappearance of individuals, by which is meant a reappearance a^ the 

 sire or dam of an individual which has not itself appeared before in the lower 

 ancestral jrenerations. These primary reappearances, together with all the fore- 

 going ancestors which they involve, are then enumerated for each generation 

 and the consequent additions substituted in the (p„+.— Q'n+i) po?ition of the 

 formula, while the maximum possible number of ancestors for the particular 

 ancestral generation involved i.^ substituted for p„+i. The result i^hows the 

 percentage of inbreeding. The author demonstrates the relation of the coeflB- 

 cients of inbreeding to the hereditary constitution of the individual. 



It is believed that this method *' is equally applicable to all pedigrees and to 

 all degrees and types of inbreeding " ; and that " the proposed coefficients of 

 inbreeding may be made extremely useful in studies of the problem of the effef;t 

 of inbreeding, whether in relation to its purely theoretical aspects, or in the 

 practical fields of stock breeding and eugenics." 



A contribution toward an analysis of the problem of inbreeding, R. 

 Pkarl (Atner. Nat., Jfl (1913), Xo. 562, pp. 5117-614, fiO^. 2).— This article is an 

 elaboration on material reported above. 



The feeding of farm animals, O. Kellneb {Dig Erndhnnig der LanJwirf- 

 schaftUchen Nittziere. Berlin, 1912, 6. ed., rev. and enl, pp. XII -\-6JfO).— This, 

 is the sixth edition of this treatise, revised and enlarged (E. S. R., 17, p. 63). 

 It comprises a very comprehensive study of the feeding of domestic animals and 

 includes summarized accounts of feeding experiments previously reported from 

 other sources. 



The development of agricultural feeding knowledge, F. Honcamp {Landiv. 

 Vers. Stat., 19-80 (1913), pp. 1-70). — In this treatise the author outlines in a 

 general way the work of the various German investigators in animal nutri- 

 tion and the various steps in the development of general feeding knowledge. 



Results of nuclein feeding of animals {TicrcirztL ZentbL, 36 (1913), Nos. 

 25, pp. 384-389; 26, pp. 401-405). — A special feed (lavocat), rich in nuclein and 

 of a high phosphorus content, when fed to horses and cattle proved of value as 

 a stimulant and body builder. This was especially true of old horses, young 

 calves, and animals affected with digestive ailments. 



[The value of calcium chlorid in animal production], R. Emmerich and 

 O. EOEW (Deut. Landw. Tierzuclit, 17 (1913), Xo. 28, pp. 3.55^.35).— Experiments 

 in feeding calcium chlorid to calves and pigs resulted in an increase in weight 

 of from 10 to 25 per cent as compared with animals on feeds lacking in this 

 element. In these experiiv.ents the calcium chlorid was added to the drinking 

 water, and the feed included fish meal and skim milk, both relatively high in 

 calcium. 



On the values of feeding materials, F. Mach (Landw. Vers. Stat.. 79-80 

 (1915), pp. 815-846, fig. 1). — This reports analyses of sesame cake, pojipy cake, 

 palm-seed cake, oil cake, and rice meal, with comments and tables on the rela- 

 tive market value of these and other concentrate feeds as determined by their 

 feeding value. 



Inspection of commercial feeding stuffs, P. H. Smith and C. L. Reals 

 {Massachusetts Sta. Huh 146, pp. 3-61). — This bulletin contains analyses and 

 discussion of the following commercial feeding stuffs: Cotton-seed meal, linseed 

 meal, gluten meal, gluten feed, distillers' dried grains, malt sprouts, brewers' 

 dried grains, wheat middlings, wheat bran, rye feeds, molasses feeds, calf 

 meals, puffed wheat, corn meal, ground oats, rye meal, hominy meal, provender, 

 dried beet pulp, corn bran, meat scraps, meat and bone meal, blood meal, fish 

 menl. milk albumin, alfalfa meal, and proprietary mixed feeds. 



