372 EXPERIMENT STATION RECORD. 



locality where post horses were kept beeiiiue to some extent a center of improved 

 agricnlturaj methods. 



Science and art of poultry culture, E. B. Hawks {[CJinton, Wis.], 1909, 

 PI). X+'i90, fiys. 50. dgiii.s. S). — The information contained in this practical text- 

 book on ponltry husbandry and its various branches was obtained largely from 

 the experiment stations, poultry journals, and the experience of the author. 



Poultry culture, A. A. Brigham, J. H. Robinson, and H. D. Smith (Mass. 

 [Bd.] Agr. BuL 1, iW- lOJi, figs. 13, dgms. 2). — This is a popular discussion of the 

 poultry industry. 



[Poultry experiments], A. G. Gilbert (Canada Expt. Farms Rpts. 1907, 

 pp. 2.'i2-261). — The cotton front house was tested and found to be satisfactory. 

 The birds remained in good health, none of the combs was frozen, a satisfac- 

 tory number of eggs was laid, and a large percentage of the eggs were fertile. 



Experiments were made in artificial hatching and rearing of chickens. Dur- 

 ing April and May a larger percentage of eggs were hatched by hens than by 

 incubators. Heated and unheated poultry houses were contrasted, with the 

 result that hens kept in unheated houses laid the more eggs. Results are tabu- 

 lated which show the advantages of breeding prolific egg-laying strains by selec- 

 tion of the best layers. 



[Poultry experiments], R. Harcourt and W. R. Graham (Ann. Rpt. Ontario 

 Agr. Col. and Expt. Farm, J4 (1908), pp. 77-79, 16^-169) .—The results of incu- 

 bation experiments the past year were in accord with the findings of previous 

 years; i. e., that there is a relationship between the vitality of the chick and 

 the amount of lime which it contains at the "time of hatching. There was also a 

 relationship between the carbon dioxid evolved and the amount of lime absorbed 

 by the chick. 



" The ratio is not constant, but the greater the quantity of gas evolved the 

 higher is the amount of lime absorbed. It would seem from this, then, that it 

 is the chick with the greater natui-al vitality, the one with the freer and more 

 healthy respiration while incubating which will absorb the most lime, and will, 

 consequently, come out of the shell with the stronger and better built body, 

 more likely to withstand the hardships connected with the early life." 



The results obtained with different styles of poultry houses were practically 

 the same as in previous years. The coldest or cheapest house built of single ply 

 boards has given the best results, and the warmest, built of several thicknesses 

 of boai'd and paper with a 4 in. dead air space between the walls, has given the 

 poorest results each winter. 



Report of the departmental committee on poulti^r breeding in Scotland, 

 J. Murray et al. {Edinburgh, 1009, pp. 18). — This report on the present status 

 of the poultry industry of Scotland deals with the methods commonly followed 

 in breeding, keeping, and marketing poultry. Suggestions are also made for the 

 improvement of this industry. 



Further results of transplantation of ovaries in chickens, C. C. Guthrie 

 (Jour. Expt. Zool., 5 (1908), Ao. Jf, pp. 563-571, figs. S; abs. in Ztschr. IndiikiivG 

 Abstam. u. Vererbimgslehre, 1 (1909), No. 5, pp. 47i, .}72). — Ovaries were ex- 

 changed between 2 black and 2 white Leghorn pullets weighing 650 gm. each. 

 The transplanted ovaries seemed to function in a normal manner, for there were 

 no marked differences in egg production between the operated and control hens, 

 nor in the fertility of the eggs. The color of the chickens showed the eggs from 

 the operated hens to be from the transplanted ovaries, yet the foster mother 

 exerted an influence on the color of the offspring. 



Data on the inheritance of fecundity obtained from the records of egg 

 production of the daughters of " 200-egg " hens, R. Pearl and F. M. Sur- 

 face (Maine Sta. Bui. 166, pp. ■'t9-8.'i, figs. ,'/).— This bulletin is the second paper 



