618 FOODS AND FOOD ADULTERANTS. 



5533. Silver Star Baking- Powder. 

 [Made by E. Canby, Daytoii, Ohio.] 



Available carbonic acid per cent.. 7.61 



Cubic iucb.es per ounce of powder at 212 F 1)1. 4 



PERCENTAGE COMPOSITION. 



Total carbonic acid, CO 2 .' 9.89 



Sodium oxide, Na./) 12.69 



Potassium oxide, K 2 O .74 



Calcium oxide, CaO 2. 16 



Aluminum oxide, A1 2 O 3 3. 38 



Ammonia, NH 3 .77 



Phosphoric acid, P 2 O 5 5.30 



Sulphuric acid, SO 3 10.66 



Starch 37.57 



Water of combination and association by difference ..-. 16. f4 



100. 00 



PROBABLE PERCENTAGE COMBINATION. 



Sodium bicarbonate, NaHCO 3 18.88 



(Eesidual sodium oxide, Na 2 O) 5. 73 



Ammonia alum, anhydrous : 



AUCSOOa 11.25 



(NH 4 ) 2 SO 4 . 2.98 



14. 23 



Calcium sulphate, CaSO< 1.66 



Acid phosphate of lime, anhydrous : 



Ca s (P0 4 ) 2 2.73 



H 3 PO 4 5.59 



H. 32 



Starch 37.57 



Water of association (phosphate) aud crystallization (alum) 13. (il 



100. 00 

 5534. Purity Baking-Powder. 



\ Made by Smith, Railway & Co., Baltimore, Md.J 



Available carbonic acid per cent.. 7.13 



Cubic inches per ounce of powder at 212 F s">. ti 



PERCENTAGE COMPOSITION. 



Total carbonic acid, CO 2 9.32 



Sodium oxide, Na z O 12. 'Jl> 



Calcium oxide, CaO 4.55 



Aluminium oxide, A1 S O :I 3.3-1 



Ammonia, NH 3 . '.'3 



Phosphoric acid, P 2 O 6 3. ">:; 



Sulphuric acid, SO 3 13. 2:5 



Starch .". 40.19 



Water of combination and association by difference 12. <>2 



100. 00 



