ANIMAL PKODLCTION. 771 



Ohio f-xchiin^ie cxiieriuifiU shows uo appMiviit udvautuKe iu streugth for wool 

 grown iu either State." 



The policy in respect to the sheep industry, T. K. Ahkell (Agr. Gaz. Canada, 

 1 {I'Jl-'i). \<>. 7. pp. 5-'f6-o-'i!K fii/.i. .i). — II is stated that the methods of assisting 

 sheep raisers used by the live-stock branch of the Canadian Department of 

 Agriculture are "(1) the loaning of pure-bred sires to associations of farmers 

 living in districts where it is difficult to obtain first-class animals or where their 

 financial status is such that they can not afford to pay the necessary purchase 

 price. (2) provision of the services of exi)ert wool graders to classify and prepare 

 in a marketable condition the wool of mutual organizations of sheep raisers, (li) 

 prosecution of instructional and practical demonstrations by experts of the 

 branch in the various phases of sheep husbandry, with siiecial stress upon the 

 most elTective methods of caring for wool, which are supplemented by an exhibit 

 containing samples of many types of wool raised in this and other countries, 

 together with their products of manufacture." 



A table is given showing the correlation of American, British, and Canadian 

 grades of wool and their distinctive terms. There is also included a complete 

 classification of Canadian wool. 



The Maryland hog' (Mari/Jand »Sf«. Bui. 185 (lOlJf), pp. 58. p'yu. 27).— This 

 includes a discussion by C. L. Oppermau of the status of the swine industry in 

 Maryland, and of methoils of housing, feeding, care, and management of hogs 

 and the curing of pork, and a description of the various types and breeds by 

 R. H. Iluffner. 



Fattening and improving the hog, N. P. Escobar (Estac. Ayr. Expt. Viuda4 

 Juarez, Chihuahua, Bol. .'iS {1913), pp. 41, pis. 7).— This is a general bulletin 

 treating of the different breeds of hogs and their adaptability to Mexican con- 

 ditions, together with a discussion of methods of fattening and of butchering. 



Stallion enrollment. — II, Stallion ser^dce liens and sale of bred mares, 

 D. O. Thompson {Indiana Sta. Circ. 1,5 {191),), pp. -'/, fig. 1). — This circular 

 gives the text of the sections of the Indiana stallion enrollment law relating to 

 stallion service liens and the sale of mares and foals, with a brief discussion 

 of them. 



Stallion enrollment.— Ill, Report of stallion enrollment work to date of 

 October 31, 1914, with lists of stallions and jacks enrolled and a brief study 

 of some phases of the stallion and jack situation in Indiana, D. O. Thompson 

 {Indiana Sta. Circ. .',6 {1914), PP- ■^■J''*' /'.'/•«• J9). — This circular gives the text 

 of the Indiana law relating to the enrollment of stallions and jacks kept for 

 public service; a rerwrt on work under the law; and lists showing the distribu- 

 tion of stallions and jacks by counties. 



Stallion enrollment. — III, Renewals for 1915, D. O. Thompson {Indiana 

 iSta. Circ. Ifi {1914), pp. 4). — This circular explains the methods for veterinary 

 examination of public service stallions and the renewal of enrollment. 



Which stallion and why? {Kansas Sta. Circ. 42, pp. 4)- — This circular is in- 

 tended .MS a stimulus to the raising of better horses in Kansas. It discusses the 

 importance of the use of a sui>erior stallion during the breeding season and gives 

 a list of registered stallions. 



Relation of simultaneous ovulation to the production of double-yolked 

 eggs. Maynh': R. Curtis {U. S. Dcpt. Agr., Jour. Agr. Research, ,3 {1915), No. 5, 

 pp. 375-385, pis. 7). — This is a continuation of work previously notetl (PI S. R., 

 .*>1. p. 170). The author summarizes her observations as follows : 



"Double-yolked eggs with normal separate yolks may have all the egg envelopes 

 common to the two yolks, or they may have some separate and some common 

 envelopes. They may be classified with reasonable accuracy into three groups: 

 936S1°— No. 8—15 6 



