354 POULTRY PRODUCTION 



Tlie customary form for furnislung it is granulated bone. 

 This is a l>y-proiluet of the packing-house and consists of 

 animal hones, from which all the gristle and grease have been 

 removed, ground to a suitable size varying from powder to 

 the si'/.e of a grain of corn. 



Kock phosphate (floats) has sometimes been urged as a 

 more desirable source of phosphate tlian bone. H. J. 

 Wheeler,' and Hartwell and Kirkpatrick/ both found that 

 ground bone was a better source than the rock phosphate. 



Bartlett' found that the adciition of 7 per cent bone ash 

 to a ration consisting wholly of vegetable matter gave a 

 slightly higher digestion coefficient than when the mixture 

 was fed without it. Bolte'' reports that the addition of bone 

 ash to a ration whose main source of protein was granulated 

 milk markedly increased the efficiency of the ration. 



Fine ground bone contains;^ 



Phosphoric acid . .20.22 per cent. 



Lime 28.00 " " 



Protein 26.47 " " 



Bone {Green Cvl). — Fresh bone trimmed from meats in 

 butcher sliops are run through a green bone cutter and used 

 for feeding poultry. This is a palatable and nutritious food, 

 containing a high percentage of ash in the bone and easily 

 digestible proteids in tlie meat which clings to the bone, 

 and is especially good for egg production. This food cannot 

 be shipped or kept for any length of time before it spoils. 

 Therefore it is usually prepared directly on the farm, or in 

 the market for a local trade. Although fowds are more fond 

 of meat in this form tlian any other, care should be taken 

 not to feed an excess or any that is tainted in the least. 

 When fed at the rate <if one ounce jjer fowl e\er>' other day, 

 no hariu residts and it is decidedly palatable. Too higli a 

 l)riee sliouid not be ];>aid for this feed, liowcver, as it contains 

 but about LS per cent ])rotein and sliould be purchased on 

 the protein basis, using first ciuality beef sera]i as a standard. 



The Massachusetts Exj>eriment Station"^ report bowel 



■ New York Bulletin No. 242. " Rhode Island Bulletin No. 145. 



' Maine Bulletin No. 184. ' Rhode Island Bulletin No. 126. 



' North Carolina Bulletin No. 211. « Bulletin No. 122. 



