602 FOODS AND FOOD ADULTERANTS. 



PROBABLE PERCENTAGE COMBINATION. 



Sodium bicarbonate, NaHCO 3 17.67 



(Residual sodium oxide, Na 2 O) f,. UL> 



Potassium bitartrate, KHC 4 H,O 6 56.60 



Calcium sulphate, CaSO 4 .37 



(Calcium oxide, CaO) 76 



Starch 12.78 



Water of association 6.73 



100. 00 



This sample contains rather more lime than most of the other tartrate 

 powders. The excess given above is probably combined with tartaric 

 acid as calcium tartrate; the same is true of the two following samples: 



5527. Gilbert S. Graves' 8 Imperial Baking- Powder. 

 [Made by The Imperial Baking-Powder Company, Buffalo, N. T.] 



Available carbonic acid 7.28 



Cubic inches per ounce of powder at 212 F 87.4 



PERCENTAGE COMPOSITION. 



Total carbonic acid, CO 2 8.47 



Sodium oxide, NazO 13.62 



Potassium oxide, K 2 O 9.42 



Calcium oxide, CaO .45 



Tartaric acid, C 4 H 4 O 5 32.74 



Starch 24.57 



Water of combination and association by difference 10. 73 



100. 00 



PROBABLE PERCENTAGE COMBINATION. 



Sodium bicarbonate, NaHCO 3 16. 16 



(Residual sodium oxide, Na. 2 O) 7.66 



Potassium bitartrate, KHC 4 H 4 O 6 46.63 



(Calcium oxide, CaO) .45 



Starch 24.57 



Water of association... 4.53 



100.00 

 5529. Thurber's Best Baking- Powder. 



[Made by H. K. & F. B. Thnrber & Co., West Broadway, Reade and Hudson streets, New York. | 



Available carbonic acid per cent.. 1O 26 



Cubic inches per ounce of powder at 212 F 123.2 



PERCENTAGE COMPOSITION. 



Total carbonic acid, COz 10.54 



Sodium oxide, NaaO 10. 65 



Potassium oxide, K 2 O 12.26 



Calcium oxide, CaO .66 



Tartaric acid, C 4 H 4 O 6 3-. 7.. 



Sulphuric acid, SO 3 .07 



Starch 13.41 



Water of combination and association by difference ... 13. c.6 



100. 00 



