| 12 BULLETIN 1115, U. S. DEPARTMENT OF AGRICULTURE. 
TABLE 2.—Effect of storage on chemical composition of calcium arsenate—Continued. 
Perioa | Water-| Car- _ _| Water-| Car- 
} Sample ex- Date -| . of splubie pon Sample ex- Date: Eeriod solope au 
} amined. sampled. | stor- =, Bxid amined. sampled. stor: | oxid | 4nd 
if a8e- |(As20s5).| (CO2). age. |(As:0s).| (CO:). 
BS-5 (25 pounds CS (50 pounds 
in unlined 1920. Mos. | Perct. | Perct. in paper-lined | 1920. Mos. | Per ct. | Per ct 
veneer drum)-..} Apr. 20 |....... 0. 29 4. 80 veneer drum) | Sept. 17 4.9 0.36 4.89 
June 10; 1.7 -35 | 5.15 (continued.) | Oct. 15| 5.8 .35 | 5.47 
July 14 2.8 30 5. 08 Nov. 17 6.9 40 5. 78 
Aug. 14] 3.8 36| 5.68 Dec. 15| 7.8 38 | 5.61 
Sept. 17 4.9 50 5. 80 
Oct. 15 5.8 48 5. 88 1921 
Nov. 17 6.9 Cl (es See Jan. 15 8.8 41 5.78 
Dee. 15 7.8 67 6. 63 Apr. 2) 11.4 64 4.04 
July 1 14.3 -41 6.18 
' 1921 Octs oot 17.3 -45 5.90 
Jan. 15 8.8 - 64 6. 84 
Arr.” 2)| 11.4 s74.1) -7.at 1922. 
July 1 14.3 Sh 7.23 Jan. 2] 20.4 54 6. 22 
Oct. - 1 17.3 - 76 6.97 
CS-1 (25 pounds 1920. 
1922. in metaldrum)| Apr. 20 |....... 15 4.68 
Jan. 2] 20.4 . 94 7.07 June 10 1 er .14 4.33 
ay 14 a 14 4.22 
cs ug. 14 ; 14] 4.63 
BS-6 (25 pounds Sept.17| 49| 217] 4.37 
in paper-lined | , 1920. Oct. 151| 5.8 || « aaeear 
veneer drum)..| Apr. 20 |.-..... .34 4.79 Nov. 17 6.9 12 4.47 
June 10 Tad 74 | 4.74 Dea 15 73 12 4.10 
July 14] 2.8] .28| 4.83 ; ; 
Aug. 14 3.8 25 5. 28 1921 
Sept.17| 4.9 42) 5.10 Jan. 15| 88] .13|- 4.60 
Oct. 15 5.8 32 5.11 ‘Apr. 2 11.4 “14 4.99 
Nov. 17 | 6.9 39 |-.-.--- July 1] 143] 214] 4.59 
Dec. 15] 7.8 43) 5.93 Oct. 1| 17.3] ..14| 4:38 
1921 1922 
Jan. 15 8.8 255 6. 23 
Apr. 2| 11.4 -60 6.68 Jan. 2]. 20.4 12 4,20 
ar barrel)..... prs 20 Pile : 
1922. r E ) June 10| 1.7] :20| 4.88 
Jan. 2) 20.4) .94] 6.99 July 14] 2.8] .27| . 5.31 
7 aoe is] 8) oe 
CT (100 pounds ept. 1 : ; 2 
mere | dee] eo 2] $3) cal BB 
es ec. eer eeee ° . . . . . 
ba ) Dec. 15 7.8 47 6.00 
1920. , 
Jan. 8 i . 76 3.29 1921 Q 
Feb. 6 Pe .65 3.33 Jan. 15 8.8 -45 6.30 
Mar. 6 Sek - 06 3.45 5 0) eee i Pt le .42 6.17 
Apr. 7 4.2 44 3.52 July 1 14.3 44 6. 25 
May 4 Bak 52 3.60 Oct. 1 li .42 6.00 
June 10 6.3 54 3.74 
July 14 Tt: . 60 3.79 1922. 
Aug. 14 8.4 . 69 3.90 Jan. 2| 20.4 54 6.20 
Sept. 17 9.5 -47 3.43 
Oct. 15] 10.5 .52| 3.63 |} CS-3 (25 pounds 
Nov. 17} 11.5 .69 3. 87 in paper-lined 1920. 
Dec. 15 | 12.5 . 63 4.19 sugar barrel)..| Apr. 20 |....... 15 4.40 
June 10 5 iy -16 4.47 
1921. July 14] 2.8 <7 | 24566 
Jan. 15 a, - 55 3.93 Aug. 14 3.8 -38 OST 
Apr. 2 16.0 43 5.97 Sept. 17 4.9 - 50 5.98 
July 1 19.0 -62 3.98 Oct. 15 5.8 -45 5.76 
Oct. 1] 22.0 Rift 4.17 Nov. 17 6.9 . 46 6.06 
Dee. 15 7.8 43 6.14 
al 25.0 70| 4.40 1921 
oe Jan. 5 ii “— ce 
CS (50 poundsin Apr. 1. , , 
pateeiioee ve- 1920. July 1] 14.3 -44 6.31 
neer drum)....} Apr. 20 |....... 15 4.47 Oct. el Miss -44 6.31 
july 14 28 a 176 1922 
Ju 1 ; : . 5 
Aue 14] 3.8 .24 | 5.24 Jan, 2| 20.4 52| 6.26 
