12 BULLETIN" 1115^ U. S. DEPARTMENT OF AGRICULTUEE. 



Table 2. — Effect of storage on chemical composition of calcium arsenate — Continued. 







Period 



of 



stor- 



Water- 



Car- 









Water- 



Car- 



Sample ex- 

 amined. 



Date 

 sampled. 



soluble 



arsenic 



oxid 



bon 

 di- 

 oxid 



Sample ex- 

 amined. 



Date 

 sampled. 



Period 



of 



stor- 



soluble 



arsenic 



oxid 



bon 

 di- 

 oxid 







age. 



(AS2O5). 



(CO2). 







age. 



(AS2O5). 



(CO2). 



BS-5 (25 pounds 

 in un lined 











CS (50 pounds 











1920. 



Mos. 



Perct. 



Perct. 



in paper-lined 



1920. 



Mos. 



Perct. 



Perct. 



veneer drum).. 



Apr. 20 





0.29 



4.80 



veneer drum) 



Sept. 17 



4.9 



0.36 



4.89 





June 10 



"'i'.i' 



.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 



.69 







Jan. 15 



8.8 



.41 



5.78 





Dec. 15 



7.8 



.67 



'"6." 63 





Apr. 2 

 July 1 



11.4 

 14.3 



.64 

 .41 



4.04 

 6.18 





1921. 











Oct. 1 



17.3 



.45 



5.90 





Jan. 15 



8.8 



.64 



6.84 















Arr. 2 



11.4 



.74 



7.11 





1922. 











July 1 



14.3 



.73 



7.23 





Jan. 2 



20.4 



.54 



6.22 





Oct. 1 



17.3 



.76 



6.97 



CS-1 (25 poimds 



1920. 











1922. 









in metal drum) 



Apr. 20 



...... 



.15 



4.68 





Jan. 2 



20.4 



.94 



7.07 





June 10 

 July 14 



2.8 



.14 

 .14 



4.33 

 4.22 



BS-6 (25 pounds 













Aug. 14 

 Sept. 17 

 Oct. 15 

 Nov. 17 

 Dec. 15 



3.8 

 4.9 



.14 

 .17 



4.63 

 4.37 



in paper-lined 

 veneer drum).. 



1920. 

 Apr. 20 

 June 10 

 July 14 



""i.'7" 



2.8 



.34 

 .27 

 .28 



4.79 

 4.74 

 4.83 





5.8 

 6.9 



7.8 



.11 

 .12 

 .12 



4.31 

 4.47 

 4.10 





Aug. 14 



3.8 



.25 



5.28 





1921. 

 Jan. 15 

 Apr. 2 

 July 1 

 Oct. 1 











Sept. 17 

 Oct. 15 

 Nov. 17 

 Dec. 15 



4.9 



5.8 

 6.9 



7.8 



.42 

 .32 

 .39 

 .43 



5.10 

 5.11 



""'5.' 93 





8.8 

 11.4 

 14.3 

 17.3 



.13 

 .14 

 .14 



.14 



4.60 

 4.22 

 4.59 

 4.38 





1921. 

 Jan. 15 

 Apr. 2 



8.8 

 11.4 



.55 

 .60 



6.23 

 6.68 





1922. 

 Jan. 2 



20.4 



.12 



4.20 





July 1 

 Oct. 1 



14.3 

 17.3 



.67 

 .72 



6.91 

 6.93 



CS-2 (25 pounds 

 in unlined su- 



1920. 











1922. 

 Jan. 2 









gar barrel) 



Apr. 20 





.14 



4.47 





■MA 



.94 



6.99 





June 10 

 July 14 



'"i."?" 



2.8 



.20 

 .27 



4.88 

 5.31 















Aug. 14 



3.8 



.36 



5.22 



CT (100 poimds 













Sept. 17 



4.9 



.47 



5.78 



in paper-lined 



1919. 











Oct. 15 



5.8 



.43 



5.73 



veneer drum).. 



Dec. 1 

 1920. 





.83 



3.30 





Nov. 17 

 Dec. 15 



6.9 



7.8 



.47 

 .47 



6.15 

 6.00 





Jan. 8 



1.2 



.76 



3.29 





1921. 











Feb. 6 



2.2 



.65 



3.33 





Jan. 15 



8.8 



.45 



6. .30 





Mar. 6 



3.2 



.56 



3.45 





Apr. 2 



11.4 



.42 



6.17 





Apr. 7 



4.2 



.44 



3. .52 





July 1 



14.3 



.44 



6.25 





May 4 



5.1 



.52 



3.60 





Oct. 1 



17.3 



.42 



6.00 





June 10 



6.3 



.54 



3.74 















July 14 



7.4 



.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 

 June 10 



■"i.'f 



.15 

 .16 



4.40 

 4.47 





1921. 











July 14 



2.8 



.17 



4.86 





Jan. 15 



13.5 



.55 



3.93 





Aug. 14 



3.8 



.38 



5.71 





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 



.71 



4.17 





Nov. 17 

 Dec. 15 



6.9 



7.8 



.46 

 .43 



6.06 

 6.14 





1922. 





















Jan. 2 



25.0 



.70 



4.40 





1921. 

 Jan. 15 



8.8 



.46 



6.04 



CS (50 pounds in 













Apr. 2 



11.4 



.42 



6.14 



paper-lined ve- 



1920. 











July 1 



14.3 



.44 



6.31 



neer drum) 



Apr. 20 

 June 10 



...... 



.15 

 .18 



4.47 

 4.42 





Oct. 1 



17.3 



.44 



6. .31 





July 14 



2.8 



.18 



4.76 





1922. 











Aug. 14 



3.8 



.24 



5.24 





Jan. 2 



20.4 



.52 



6.26 



