BAKING POWDERS. 617 



PROBABLE PERCENTAGE COMBINATION. 



Sodium bicarbonate, NaHCO 3 11. 68 



(Residual sodium oxide, Na 3 O) 6.01 



Ammouia alum, anhydrous: 



Al a (S0 4 )3 12.49 



(NH 4 ),SO 4 3.02 



NH 3 26 



15. 77 



Acid phosphate of lime, anhydrous: 



Ca 3 (PO 4 ) 2 5.15 



H 3 PO 4 4.87 



10. 02 



Starch 42.66 



Water of association (phosphate) and crystallization (alum) 13. 86 



100. 00 

 5532. Eureka Baking -Powder. 



[Made by G. S. Teeny, Wheeling, ~W. Va.] 



Available carbonic acid per cent.. 7.62 



Cubic inches per ounce of powder at 212 F 91.5 



PERCENTAGE COMPOSITION. 



Total carbonic acid, CO 2 9. 57 



Sodium oxide, Na^O 11.36 



Calcium oxide, CaO 1.93 



Aluminium oxide, A1 2 O 3 3. 14 



Ammonia, NH 3 .85 



Phosphoric acid, P a O 5 2.66 



Sulphuric acid, SO 3 11. 30 



Starch 44.32 



Water of combination and association by difference 14. 87 



100. 00 



PROBABLE PERCENTAGE COMBINATION. 



Sodium bicarbonate, NaHCO 3 18.27 



(Residual sodium oxide, Na^O) 4. 62 



Ammonia alum, anhydrous: 



A1 2 (S0 4 ) 3 10.45 



(NH 4 ),S0 4 3.31 



13. 76 



Calcium sulphate, CaSO 4 3.38 



Acid phosphate of lime, anhydrous : 



Ca 3 (PO 4 ) 2 99 



H 3 PO 4 2.92 



3.91 



Starch 44. 3'2 



Water of association (phosphate) and crystallization (alum) 11.74 



100. 00 



