EFFECT OF ALKALI TREATMENT ON COCOAS. 13 
creased the total water-soluble matter and the water-soluble matter 
minus the ash, but the nonnitrogenous, nonash soluble matter did 
not vary. Of course, the increase in total amount of alkali increased 
the ash constants throughout. The greatest difference shown by 
these two treatments is the large increase in the color value of the 
solution by the use of the mixed carbonates. As will be shown later, 
this large increasein color is due principally to the action of the sodium 
carbonate. 
TABLE 7.—Comparison of water-soluble matter in treated and untreated cocoas. 
| Water-soluble | 
Water-soluble matter. Ash of water-soluble matter. protein | Color 
(N x 6.25). value 
4 per 
cent so- 
Alkalinity (N/10 acid Tnsolu- | lution 
per gram of cocoa). blein | (4-inch 
No. Wen Ash- Water- | Water- 1 per cell, 
Total. | - fe ~ | and | Total.| solu- | insolu- Total. | cent | brew- 
tee. | protein- ble. ble. | Water- | Water- sul- ers 
free. solu- | insolu- | Total. phuric | Scale). 
ble. ble. acid. 
iPRctoi| rence|pherict. \eenct.|Per ct.| Per ct- Cc. Ce. Cc: Per ct. | Per ct. |Degrees. 
2} 29.59} 22.61] 10.86) 6.98 4.79 2.19 4.45 3.40 U8) | 12625 3.25 53.4 
1B S28529n| peaked On iSilia i. 12 4.59 2.53 2.00 3.85 5.85 | 10.39 81 36.8 
UE ores eed. 220| su loros. | 09-80 9.00 . 80 8.00 2 LOM LOLLO) te. 29 .79 70.0 
DESL OM e227, Ie LOLSSi | 8.93 7.88 1.05 6.90 2.40 9.30 | 11.34 2.30 59.9 
16 | 36.00 | 25.26 | 12.26 | 10.74 Sada) adsl LOAS 2.40 | 12.85] 13.00 3.54 93.6 
D2 Slo2ial 2d.67 | 12.38 1 8.60 7.63 S7 6.75 2.90 9.65] 11.36 2.67 43.3 
22 | 32.65 | 24.06] 13.80] 8.59 6. 83 1.76 5.35 3.75 9.10] 10.26 94 67.3 
783 i) BGR || PAGE |S MGA e aerate) 3. 89 3.67 2.80 4.70 7.50 9.51 . 00 39.3 
20 | 36.72 | 28.93 We Ql zk9 7.14 . 62 10. 25 2lOw ie 12535 11.66 3.15 98.4 
19 | 33.14 | 26.79} 14.43 | 6.35 3.54 2.81 2.95 4.65 TBO eel 2825 . 00 30.6 
26 | 33.42 |, 28:22) 15.16 | 5.20 4.10 1.10 2.50 B35 15) 5.65 | 13.06 iid 68.0 
25 | 32.55 | 26.18 | 15.16] 6.37 3.55 2.82 2.35 4.45 6.80 | 11.03 . 00 31.5 
28 | 33.50 | 25.89] 12.86] 7.61. 6.53 1.08 5.00 3.04 8.05 | 13.03 2.32 81.8 
29 | 31.84 | 26.15} 13.43] 5.69 3.91 1.78 3.50 3410 CoPBy Ns 7? 1.96 50.6 
31 | 34.35 | 26.80| 14.39] 7.55 6.37 1.18 | 10.30 242 ov pal 2zoon alias ail 3.50 76.2 
30 | 33.90 | 26.96 | 14.79 | 6.94 4.79 2215 5.15 3.30 Sadun iy L217 . 00 29.2 
33 | 31.26 | 24.76 | 13.76] 6.50 5.12 1.38 | -6.80 2.00 8.80 | 11.00 2 81.4 
32 | 32.68 | 26.93 16.60 | 5.75 4.02 1.73 3.50 3.35 6.85 | 10.33 . 00 31.3 
46 | 28.82 | 23.80 | 12.30] 5.02 3.79 1.23 3.95 3.45 7.40 11.50 2.19 46.4 
44 | 30.54 24.12 14.11 6. 42 3.55 | 2.87 2.30 4.50 6. 80 10. 01 . 00 Diez 
Sample 22 was treated with 1 per cent potassium carbonate and 
shows a slightly increased total soluble matter, but less ash-free solu- 
ble matter and protein- and ash-free soluble matter. The alkali 
treatment shows an increase in the color value and the expected 
Increase in the ash constants. Sample 20, treated with 2.5 per cent 
sodium carbonate, shows an increase in the soluble solids throughout 
and in the color value. Sample 26, treated with 4 per cent ammonium 
carbonate, shows a slight increase in the amount of soluble matter 
and in the color value of the solution. Sample 28, treated with 1 per 
cent sodium carbonate, shows a larger percentage of total soluble 
Solids, but a smaller percentage of ash-free and protein- and ash-free 
