AN1MAI> PRODUCTION. 777 



the first report of govenmienlal control in the improvement of breeding horses 

 in New South Wales. Up to March 31, 1910, 22.6 per cent of the stallions 

 imported were refused certificates, 82.12 per cent because of unsoundness, and 

 4.4 per cent were below standard. The results of the exaniinalions have also 

 shown that the majority of sires in New South Wales are grades. 



Egg-laying competitions at Hawkesbury Agricultural College and Ex- 

 periment Farm, Richmond, New South Wales, D. S. Thompson {Agr. Gaz. 

 N. S. Wales, 21 (1910), No. 7, pp. 620-639, figs. 32).— The average results of the 

 eighth annual test show an advance over results of previous years. The first- 

 year hens returned a profit of 15s. over the cost of feed. The second-year hens 

 gave a profit of 9s. 8d., and the ducks 7s. The average number of eggs per hen 

 was 181, an increase of 40 per cent over the first test. The average number of 

 eggs laid by the ducks was 156.5. The best pen was of the Brown Leghorn 

 breed, which laid an average of 208.1 eggs per hen. 



The encyclopedia of poultry, edited by .J. T. Brown (London [1910], pp. 

 ■126. pis. lO.j, figs. 207). — The aim of the editor of the encyclopedia, as stated, is 

 to provide a reliable book of ready reference, upon each phase of the subject, 

 for those who are interested in the poultry industry. 



The poultry industry (Bui [Maine] Dept. Agr., 9 (1910), No. 3, pp. 71-98, 

 figs. 13). — This bulletin is devoted principally to a discussion of marketing poul- 

 try products by W. A. Brown. Among the topics treated are quality in eggs, 

 causes of loss between producer and consumer, methods of marketing eggs in 

 Maine, selection of birds for fattening, some of the advantages of crate fatten- 

 ing over pen fattening, feeds and feeding, killing, and methods of marketing 

 I)oultry. 



Live stock insurance (NafaJ .igr. .Jour.. 15 (1910), No. 2, pp. I.'i9-153). — 

 This contains general advice on organizing live stock mutual insurance clubs. 



Fertility and sterility, E. C'urot ( Feeondation et Sterllife. Paris, 1908. pp. 

 VII-\-287). — The topics treated in this book are the anatomy of the genital 

 organs of domesticated animals, the ovule and ovulation, spermatogenesis, fer- 

 tilization, gestation, pathology of genital organs, diagnosis and treatment of 

 sterility, effect of food and climate on fecundity, and artificial fertilization. The 

 work is written for practical breeders in order to show them the extreme sensi- 

 tiveness of the organs of generation to their environment, and to suggest 

 possible remedies in cases of the failure of either the male or female to breed. 



Sterility, M. Morse (Amer. Nat., .'I'l (1910), No. 526. pp. 62J,-633).—A review 

 of investigations on the causes of sterility in hybrids of both plants and animals. 

 The author believes that, as far as may be judged from studies upon the germ 

 cells which have thus far been made, the conclusion may be drawn that what- 

 ever may be the nature of the sterility there is an " incompatibility "' existing 

 between the chromosomes of individuals of different species or varieties. 



Histology of the ovary during pregnancy, O. O. Fellner (Arch. Mikros. 

 Anat. u. EnHvicklungsgeschichle, 73 (1909). pp. 288-305).— The author found 

 that the ovary was more or less active, which is contrary to the prevailing 

 opinion. The follicules ripened slowly and but few obtaine<l maturity. The 

 internal secretory functions were intensified. 



Determination of sex, C. and K. TmosiNt; (Xatunv. Wriinselir., 25 (1910), 

 No. 30. pp. '165-475. figs. 9). — A historical resunu' of investigations on this 

 subject. 



Inheritance as a patent factor in the cycle of organic events, E. Teiciimann 

 (Die Vcrerhung als Erhaltende Macht iin I'lii-sse Organiselien (lescliehcns. 

 Stuttgart, 1908. 2. cd., pp. 9',, pis. .',, figs. .',).— A poinilar work on the significance 

 of heredity in the life of plants, animals, and man. 



