BAKING POWDERS. 607 



PROBABLE PKRCENTAGE CO ..BINATION. 



Sodium bicarbonate, NaHCO 3 18.04 



(Residual sodium oxide, Na^O) 2.86 



Ammonia alum, anhydrous : 



AL 2 (SO 4 ) 3 12. 42 



(NH 4 ) a S0 4 .- 3.33 



NH 3 21 



. 15.96 



Starch 43.25 



Water of association and crystallization (alum) 19.89 



100.00 



5531. Cottage Baking- Powder. 

 [Made by New York Yeast Company, New York.] 



Available carbonic acid p*er cent . . 6*62 



Cubic inches per ounce of powder at 212 F 79. 5 



PERCENTAGE COMPOSITION. 



Total carbonic acid, CO 2 7.80 



Sodium oxide, Na^O 6.77 



Aluminium oxide, A1 2 O 3 3.92 



Ammonia, NH 3 ... .94 



Sulphuric acid, SO 3 1 10.63 



Starch 52.29 



Water of combination and association by difference 20. 10 



100.00 



PROBABLE PERCENTAGE COMBINATION. 



Sodium bicarbonate, NaHCO 3 14.89 



(Residual sodium oxide, NaaO) 1.28 



Ammonia alum, anhydrous : 



A1 2 (S0 4 ) 3 14.05 



(NH 4 ) 2 SO 4 3.47 



NH 3 ;. .32 



' 17. 84 



Starch 52.29 



Water of association and crystallization (alum) 13.70 



100. 00 



MIXED POWDERS. 

 5514. Dooley'i Baking-Powder. 

 [Made by Dooley & Bro., New York-1 



Available carbonic acid per cent.. 9.62 



Cubic inches per ounce of powder at 212 F 115. 6 



