1919J ANIMAL, PRODUCTIOIT. 75 



long face (Tamworth) completely dominant to short face (Berkshire), and 

 (4) erect ear (Berkshire) dominant to drooping ear (Duroc- Jersey). 



Experimental work [with poultry] H. R. Lewis (New Jersey Stas. Rpt. 

 1917, pp. 1S5-175, fig. 1). — The following research projects with poultry are 

 briefly outlined but without the presentation of results other than general prog- 

 ress reports similar to those previously noted (B. S. R., 39, pp. 780, 781). 

 Distribution and inheritance of fecundity, inheritance of plumage color, vari- 

 ation and inheritance of eggshell color, sequence of sex, strain test of Single 

 Comb White Leghorns, nutrition studies with concentrates of animal origin, 

 effect of time of hatching upon the molt and seasonal distribution of egg pro- 

 duction, the elaboration of growth and production standards, and the home pres- 

 ervation of eggs. A section on the amount and causes of embryo mortality pre- 

 sents detailed results which have been previously noted from another source 

 (E. S. R., 38, p. 876). 



A survey of 14 of the large commercial poultry breeding farms in New Jersey 

 during the year 1915-16 is reported. These farms apparently did not form 

 part of a larger survey with which the author was connected (E. S. R., 40, 

 p. 570). The labor incomes of farms maintaining less than 1,000 birds averaged 

 $660, of those maintaining 1,000 to 2,000 birds, $3,191, and of those with more 

 than 2,000 birds, $9,606. The annual production per bird for the three classes 

 of farms were, respectively, 134, 145, and 125 eggs. 



A study is undertaken of the errors incident to the use of production records 

 of pens of laying birds in experimental work. Data are presented showing how 

 differences between groups due to inherent differences in capacity might be 

 attributed to the experimental procedure. A numerical method differing con- 

 siderably from usual statistical practice is proposed for the correction of such 

 errors. It is also suggested that many errors could be avoided by doing the 

 experimental work with second-year birds, assignments to lots being based upon 

 the trap nest records of the pullet year. 



A tabulation is presented by months during the year 1916-17 of prices of eggs 

 and market fowl in New York City. To some extent this is a continuation of 

 data previously furnished by the author (E. S. R., 38, p. 373). 



Effect of certain grain rations on the growth of the White Leghorn chick, 

 G. D. BucKNEB, E. H. NoLLAU, R. H. WiLKiNS, and J. H. Kastle {Jour. Agr. 

 Research [U. S.}, 16 (1919), No. 12, pp. 305-311, pi. i).— Some unexplained 

 results from feeding grain mixtures containing soy beans to growing White 

 Leghorn chicks at the Kentucky Exi)eriment Station are reported. The experi- 

 ments originated from an observation that 1-day-old chicks failed to grow 

 when fed ground soy beans and ground oats (1:2), protein-free milk, sprouted 

 oats, cabbage leaves, grit, oyster shell, and sour skim milk. 



A group of 11 chicks fed equal parts of soy beans, oats, wheat, shipstuff, sun- 

 flower seed, and cracked corn, with the addition of some skim milk, sprouted 

 oats, shredded cabbage, grit, and oyster shell, grew from an average weight of 

 48 gm. to 490 gm. in 9 weeks, approximately a normal growth, but the animals 

 were subnormal in vigor. Two died during this period. A similar group of 

 12 chicks were fed at the same time on the same ration except that the grain 

 had been baked at 420° F. Eight died in. 9 weeks, but the average weight 

 of the survivors was 566 gm. 



In a more elaborate experiment, 3 lots of 60 chicks each were used. The con- 

 trol (lot 3) received the so-called Cornell ration (E. S. R., 29, p. 273) and at- 

 tained an average weight of 1.36 kg. (3 lbs.) at the end of 28 weeks. Lot 1 

 was fed the growth-promoting high-lysin ration previously studied by three of 

 the authors (E. S. R., 34, p. 871) with the addition of soy beans in the mash 



