ANIMAL PRODUCTION". 471 



concluded that it is practical to ship pork in freight cars in the manner 

 indicated. 



Experiments are also reported with different methods of piling pork during 

 the salting process, and with salting hard and soft pork. The latter trials show 

 that soft pork takes up more brine by injection than hard pork, but during the 

 salting process the soft pork shrinks more, so that there will be from ^ to over 

 2 per cent more salted hard than soft pork. 



Pig- clubs in England and Wales in 1910 {Jour. Bd. Agr. [London], 19 

 (1912), No. 3, pp. 203-209). — This contains data on the cooperative societies 

 for insuring pigs. There are over 1,000 of these in England and Wales, 32 of 

 which are registered. 



Kemerton and Overbury pig club (Jour. Bd. Agr. [London], 19 {1912), No. 

 3, pp. 209-214). — Statistics are given of a cooperative society for insuring 

 pigs which has been in operation for 25 years. 



The feeding of the horse, E. Lavalard {L' Alimentation du Cheval. Paris, 

 1912. pp. i6".'/). — A general treatise on this subject which gives recent results 

 of investigations that can be applied by the practical horse feeder. 



The Przewalskii wild horse, E. Weber {Ztschr. Tiermed., 16 {1912), No. 5, 

 pp. 179-192, fig. 1). — A discussion of the characteristics of Equus przeicalskii, 

 which the author considers to be the sole ancestor of the domesticated horse. 

 A bibliography is appended. 



The half-bred in Ireland: Hunters, hacks, and army horses, E. Mei'LEMAN 

 {Le Demi-Sang en Irlande: Hunters, Hacks et Troupiers. Paris, 1910, pp. 

 XI -\- 139, pis. 32). — An account of the past and present conditions of horse 

 breeding in Ireland. 



The Argentine polo ponies {Country Life [London], 31 {1912), No. 806, pp. 

 19*. 20*, figs. 4)- — This discusses the type of Argentine ponies which has been 

 recently introduced into England. 



Certification of stallions, W. A. N. Robertson {Jour. Dept. Agr. Victoria, 

 10 {1912), No. 5, pp. 2SS-315).— This reports the results of the fifth stallion 

 registration in Victoria, and also states the regulations under which the animals 

 are registered. 



Castration of the stallion standing by means of the ecraseur, J. J. Edgar 

 (Agr. Jour. Union So. Africa, 3 {1912), No. 4, pp. .',86-491, figs. 6).— Directions 

 are given for castration, based on the results of many years' experience. 



Cattle dogs and sheep dogs, R. Kaleski {Dept. Agr. N. S. Wales, Fanners^ 

 Bui. 38, 1910, pp. 15, pis. 4)- — A discussion of the requirements of good cattle 

 and sheep dogs, and a description of the varieties in New South Wales. 



Proper temperature for artificial incubation, S. Covalt {Rel. Poultry Jour., 

 19 {1912). No. 5, pp. 185, 832). — The rectal temperature of the fowls examined 

 was as follows ; Cockerels, range 105.2 to 107°, with an average of 106.8° ; laying 

 hens and pullets, range 104.S to 107.8°, average 106.6° ; sitting hens, range 105 

 to 107.4°, average 106.1°. The inside temperature of eggs under a sitting hen 

 at the end of 3, 0, 7, and 24 hours was 100°, at the end of a week 101°, at the 

 end of 2 weeks 102.4°, and on the eighteenth day 102°. When a thermometer 

 was hung on a hook in the incubator and kept at 103°, the inside temperature 

 of the eggs after 24 hours' incubation was only 97°. When the thermometer 

 was placed on the eggs and kept at 103°, the inside temperature of the eggs 

 was approximately that of eggs under the hen. 



" There is not much change in the temperature of the live chick in the egg 

 after the end of the second week. And in the incubator the live chicks in the 

 eggs showed an average of 102.4° at the end of the eighteenth day with the 

 thermometer running at 103° on the eggs. I consider that the safest and best 



62189°— No. 5—12 6 



