!N^Ew York Agricultural Experiment Station. 23 



The first series of experiments did not definitely indicate the 

 cause for the superiority of the one ration. It appeared that the 

 more favorable results when animal food was fed might be due 

 either to the more efficient forms of the nitrogen compounds or 

 with the rapidly growing young birds and the laying hens to the 

 much larger proportion of ash consisting largely of phosphates. 



Subsequent experiments have shown that while ducklings re- 

 quire a certain amount of animal food, hens and chicks are able 

 to do well on wholly vegetable food, supplemented by ash rich 

 in phosphates. In these experiments, rations of vegetable food, 

 to which bone ash was added to make up the assumed deficiency 

 of ash, in growing chicks gave identical results with those from 

 rations containing animal food. With laying hens the rations 

 were equally efiicient for most of the time but good results were 

 not sustained quite so long by the vegetable food ration. The 

 addition of bone ash did not, however, enable ducklings to make 

 as good use of a ration wholly of vegetable foods; such a ration 

 being decidedly less efiicient than one containing animal food. 



BULLETINS PUBLISHED IN 1899. 



iN'o. 158 — May. — Combating the striped beetle on cucum- 



bers. F. A. Sirrine. Pages 32, plates 

 2. 



ISTo. 159 — October. — The forest tent caterpillar. V. H. Lowe. 



Pages 30, plates 6. 



'No. 160 — October. — Report of analyses of commercial fertil- 

 izers for the spring of 1899. L. L. 

 Van Slyke. Pages 90. 



No. 161 — l^ovember. — Treatment for gooseberry mildew. C. 



P. Close. Pages 12, plates 2, diag. 1. 



Ko. 162 — ^November. — Leaf scorch of the sugar beet, cherry, 



cauliflower and maple. F. C. Stewart. 

 Pages 14, plates 6. 



