BAKING POWDERS. 601 



PROBABLE PERCENTAGE COMBINATION. 



Sodium bicarbonate, NaHCO 3 25.21 



(Residual sodium oxide, Na 2 O) 4.28 



Potassium bitartrate, KHC 4 H 4 O 6 59.25 



Calcium sulphate, CaSO 4 .17 



Starch .- 7.42 



Water of association 3.67 



100. 00 

 5507. Sea Foam ( Gantz) Baking-Powder. 



[Made by Gantz, Jones & Co., 176 Duane street, New York.] 



Available carbonic acid per cent.. 8.O3 



Cubic inches per ounce of powder at 212 F 96.5 



PERCENTAGE COMPOSITION. 



Total carbonic acid, CO 2 8. 10 



Sodium oxide, Na^O 15.47 



Potassium oxide, K 2 O 15.24 



Calcium oxide, CaO .78 



Tartaric acid, C 4 H 4 O 6 44.18 



Starch 5.32 



Water of combination and association by differeuce 10.91 



100. 00 



PROBABLE PERCENTAGE COMBINATION. 



Sodium bicarbonate, NaHCO 3 15. 46 



(Residual sodium oxide, Na z O) 9. 77 



Potassium bitartrate, KHC 4 H 4 O 6 62.92 



(Calcium oxide, CaO) .78 



Starch 5.32 



Water of association 5. 75 



100. 00 



This and the preceding, No. 5505, contain very small quantities of 

 starch, apparently rather too little for the proper preservation of the 

 last sample. 



5522. Hecker's Perfect Baking-Powder. 

 (Made by George V. Hecker & Co., 205 Cherry street, New York.] 



Available carbonic acid per cent . . 9.21) 



Cubic inches per ounce of powder at 212 F 111.6 



PERCENTAGE COMPOSITION. 



Total carbonic acid, CO 2 9. 26 



Sodium oxide, Na^O 11.61 



Potassium oxide, K 2 O 11.63 



Calcium oxide, CaO 91 



Tartaric acid, C 4 H 4 5 39.74 



Sulphuric acid, SO 3 ,22 



Starch 12.78 



Water of combination and association by difference 13.85 



100. 00 



