176 EXPERIMENT STATION RECORD. [Vol. 43 



and to have had fewer immediate ancestors which were imported from the 

 Island of Jersey. 



" Study of the pedigrees of these two groups of sires discloses the fact that all 

 the animals which appeared in the pedigrees of the superior sires on the male 

 side of the pedigrees more than four times or on the female side of the pedigi-ee 

 more than three times also liad appearance in the pedigrees, of the sires 

 inferior in their transmitting qualities. This fact alone makes it clear that the 

 appearance of certain famous animals in a pedigree of a given hull is no 

 guaranty of that particular bull's worth." 



A section is devoted to the transmitting qualities of Jersey sires to their sons 

 as determined by the production of the sons' daughters, and there is much 

 discusssion of individual breeding animals more or less famous in Jersey breed 

 history. 



The origin of the Ayrshire breed of cattle, C. Dougxas {Trans. Highland 

 and Ayr. Soc. Scot., 5. ser., 31 (1919), pp. 133-151, figs. 8).— From a study of 

 historical records and old drawings the author concludes that the Ayrshire 

 breed originated toward the end of the eighteentli century, when brown cattle 

 were imported from Holland and crossed, with the native Kylo breed. 



"That its value as a milk-yielding animal was originally deriveti in large 

 measure from the Dutch cross may be regarded as certain. But the surviving 

 pure descendants of the native breed — tlie Shetland and the almost extinct 

 Irish cows — are also, in proportion to their size, deep milkers; and they have 

 the peculiarity of giving large quantities of milk with a minimum of food and 

 comfort." 



A study of the birth weight of calves, C H. Eckles (Missouri Sta. Research 

 Bui. 35 (1919), pp. 3-11, fig. 1). — Previously noted from another .source (E. S. 

 R., 42, p. 171). 



Feeding and management of dairy cattle for official production, IM. H. 

 Roberts, jk. (Neiv York and London: Longmans, Green & Co., 1920, pp. 

 XVII-\-294, P^^- 45, figs. 21). — The author gives an account of the methods he 

 uses in managing a large herd of Jersey cattle in New York State. The topics 

 discussed include feeding methods, with particular reference to official testing, 

 care of calves and bulls, work schedules, and fitting for exhibition. Tlie 

 advanced registry rules and systems of judging of the four major dairy breeds 

 as adopted by the respective breed associations are also recorded, and an 

 appendix consists of excerpts from New York statutes concerning dairy 

 products. 



The dairy record and feeding chart, M. H. Roberts, jr. (New York and 

 London: Longmans, Green d Co., 1920, pp. 216, fig. 1). — ^This is a blank record 

 book, folio size. Eacli double page is provided with spaces for the daily feed 

 and milk records of a cow during one year, and for weekly and monthly sum- 

 maries of her milk and fat production, feed cost, and profit. 



Computation of dairy rations (Pennsylvania Sta. Bui. 161 (1920), pp. 3-2S, 

 figs. 3). — This is a revision by A. A. Borland of Bulletin 143 previously noted 

 (E. S. R., 36, p. 374). The changes are slight, the most important being in the 

 table showing the relation between the digestible protein and the available 

 energy of the grain mixture suitable for a given kind of roughage. The new 

 values imply a somewhat narrower grain ration, particularly with nonlegumi- 

 nous roughages, and they change by uniform increments with decrease in milk 

 yield and with increase in fat percentage. Cottonseed feed and the lowest 

 grade of cottonseed meal are added to the list of feeding stuffs, and a new set 

 of specimen grain rations is included. 



Sudan grass as a supplementary pasture crop for dairy cattle, L. E. Call 

 and J. B. Fitch (Kansas Sta. Circ. 80 (1920), pp. 4, fig. i).— Six cows in milk 



