138 MAIXE AGRICULTUIL\L EXPERIMEXT STATION. I905. 



Phosphate-alum powder, 10.4 per cent available carbonic gas. 



The alum powders would require a half more than the tartrate 

 or phosphate powders to produce the same leavening effect. 

 There are however ven,- few straight alum powders on the 

 market. Because of the greater leavening effect of the mixed 

 powders and the supposed less harmful residues, nearly all the 

 alum now used is in the phosphate-alum powders. 



The samples here collected and reported upon have not been 

 tested for strength, but merely for correctness of labeling. 

 ^Vlany of the less common brands were found by correspondence 

 with the manufacturers to be three or more years old. Naturally 

 such powders would not be nearly as effective as leavening 

 agents as when they were fresher. As soon as it is possible to 

 do so with the limited funds at our disposal, new sam.ples will be 

 tested for strength. The manufacturers so far as heard from 

 are ready and anxious to conform to the law. The makers of 

 mixed powders are apparently as desirous of selling their goods 

 on what they claim to be their merits as are the makers of 

 tartrate or phosphate powders. 



The list of the brands collected and comments follow. 



CREAM OF TARTAR AND TARTARIC ACID PO^NTJERS. 



7009. Cleveland Superior Baking Powder, made by Cleve- 

 land Baking Powder Co., X. Y. Purchased from A. A. Gilbert, 

 Orono, March, 1905. In tin can. Price per can 25 cents. Cost 

 of powder 3.1 cents per ounce. "A pure cream of tartar 

 powder." '' Free from alum, ammonia, lime or othet adulterant." 

 The acid salt is correctly named. 



7012. Cream Baking Powder, m.ade by Price Baking Powder 

 Company, Xew York and Chicago. Purchased from. W. L. 

 Wilson & Co,, Portland, April, 1905. In tin. Price per can 30 

 cents. Cost per ounce 1.8 cents. "A pure cream of tartar 

 powder." "' Free from aluminimi, ammonia, lime or any other 

 adulterant." The acid salt is correctly named, 



7017. Mrs. Lincoln's Baking Powder, made by ^Nlrs. Lincoln 

 Baking Powder Company, Boston, Mass. Purchased from 

 F, E, Plummer, Portland, April, 1905. In tin. Price per can 

 15 cents. Cost per ounce, 4 cents. The label states it to be a 

 cream of tartar baking powder. The acid salt is correctly 

 named. 



