16 BULLETIN 1389, U. S. DEPARTMENT OF AGRICULTURE [ 
the material stored in the dark and 2.14 per cent for that stored in. 
diffused light. In the second series the average monthly loss was 
0.76 per cent for the material stored in the dark and 0.83 per cent 
for that stored in diffused light. Light rays therefore appear to 
accelerate slightly the decomposition of chlorinated lime. 
EFFECT OF SEASONAL VARIATION 
During the first nine months of storage the average loss of available 
chlorine was 0.78 per cent per month from samples manufactured and — 
packed in the summer and 1.09 per cent from those manufactured and 
STORAGE PERIOD CIONT/S) 
ZPT | WOK Lah. PR MOY, SLE. SEFT | MOU SAN MAR. 
Sz 
TIO a 
BS 
SBURNBBS. saaeds: 
ENTE EEE 
ULNA saEEERNE 
TETAS NEEL 
CCEEECEPSENELE 
CELTS 
46 
Fic. 4.—Average loss of available chlorine in summer-packed and winter-packed chlorinated 
lime stored for 16 months 
S 
packed in the winter. The fact that the winter-packed material 
was subjected to summer temperature for a longer period, beginning 
about three months after storage, probably accounts for its greater 
deterioration. After nine months summer samples from packers 
C and D showed a rapidly accelerated rate of loss of available chlorine. 
As this increase occurred only after nine months, it can scarcely be 
ascribed to the season of manufacturing or packing the chlorinated 
lime. Omitting the values for these two samples, the average 
monthly loss for the 12-month period is 0.89 per cent for the summer 
samples and 1.01 per cent for the winter samples. 
A plot of the monthly rate of loss of each series of samples according 
to Sere teh months (fig. 5) shows a distinct seasonal variation. The 
curves for the two series are practically parallel and show that the 
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