274 EXPERIMENT STATION EECOEB. [Vol.35 



Plymouth Rocks 75 per cent of the total carcass was available, while in the 

 case of the Leghorns only 67.3 per cent was available. At this age the Barred 

 Plymouth Rocks sold for 27 cts. a pound and the Leghorns for 21 cts. 



Meat scrap in the laying ration, H. R. Lewis (Jour. Amcr. Assoc. Instr. 

 and Invest. Poultry Hush., 2 (li)16), No. 7, pp. 52, 53). — In these experiments, 

 conducted at the New Jersey Experiment Stations, pen 1 received 25 per cent of 

 meat scrap in its dry mash and pen 2 received 10 per cent. Pen 1 laid 6,711 eggs 

 during the first year, 4,207 the second, and 3,048 the third year, while pen 2 

 laid 4,639, 4,358, and 2,674 eggs during the respective years. 



From the results of the experiments it is concluded that the higher percentage 

 of meat scrap in the dry mash was justified, at least during the pullet year, as 

 the profit above feed was $127.88 as against $75.60 in the pen receiving the low 

 percentage of meat scrap. The first year of egg production in the first-mentioned 

 pen was followed by a comparatively low production, whereas the production in 

 the pen which had not been forced during the pullet year was only slightly 

 decreased. The same results seemed to show during the third year, so that 

 the general conclusion is drawn that high production during the pullet year is 

 apt to be followed by decreased production in future years. 



The mortality was practically uniform in each pen, the birds in both pens 

 remaining in good condition in general throughout the period. The hatchability 

 in each pen was practically uniform, and the size and weight of eggs in each 

 pen were not noticeably different. Under systems of management where birds 

 are kept for two laying years only, a higher percentage of meat scrap can un- 

 doubtedly be advised, as the increased production during the first year will more 

 than balance the difference during the second year. 



A study of eg'g' production and some related factors, L. E. Cakd {Jour. 

 Amer. Assoc. Instr. and Invest. Poultry Hush., 2 (1916), No. 6, pp. 42-// Jf). — 

 Records kept of laying hens at the Connecticut Storrs Experiment Station 

 showed that a given pen will consume much more oyster shell when laying 

 heavily than when laying less heavily or not at all. Using 32 pens of Single 

 Comb White Leghorns a ccwrelation table was worked out so that this relation- 

 ship might be expressed mathematically. For this purpose the year was 

 divided into thirteen four-week periods. The number of eggs laid by any given 

 pen during any four-week period was used as the basis of distribution for one 

 system of arrays, while the amount of oyster shell consumed during the same 

 period was used as the basis for the other system of arrays. The coefficient of 

 correlation as worked out from this table was 0.8724+0.0079, showing that a 

 very close correlation exists between the factors .under, discussion. The same 

 method, when applied to the heavy breeds, viz, Plymouth Rocks, Rhode Island 

 Reds, and Wyandottes, taken collectively, showed a correlation factor of 

 0.8265+0.0096. 



Similarly the relation between the amounts of grain and mash consumed and 

 the corresponding egg production was worked out. In the case of the Leghorns 

 there was a close correlation between the amount of mash consumed and the 

 number of eggs laid, i. e., 0.7493+0.0157, while there was practically no corre- 

 lation between the amount of hard grain consumed and the number of eggs laid, 

 the correlation coefficient in this case being 0.0214—0.0353. The same general 

 result was obtained in the case of the heavy breeds. 



It appears from the study thus far conducted that the production during the 

 summer months, except in the case of Wyandottes, is perhaps a better index of 

 the yearly egg yield than is the winter production. 



Value of egg shows, A. S. Chapin {Jour. Amer. Assoc. Instr. and Invest. 

 Poultry Hush., 2 (1916), No. 7, pp. 5S, 54).— The methods and plans used in 

 holding annual egg shows at Purdue University are outlined. 



