DETERIORATION OF CHLORINATED LIME 5 
lime. (Packer believed that this layer of lime helped to prevent 
deterioration. ) 
The chlorinated lime manufactured in the winter was packed in 
containers of the following types. Packer A: 12-ounce size, paraf- 
fined fiber container with lacquered metal ends; 5 and 10 pound sizes, 
lacquered metal can with crimped top. Packer B: 8-ounce size, 
paraffined fiber container with top of same material glued on; 5 and 
10 pound sizes, lacquered metal can with crimped top. Packer C: 
12-ounce size, paraffined fiber container with top of same material 
glued on; 5-pound size, paraffined fiber container with top of same 
material glued on. Packer D: 5 and 12 ounce sizes, paraffined fiber 
container with lacquered metal ends; 5-pound size, paraffined fiber 
container with top of same material glued on; 10-pound size, lacquered 
metal can with crimped top. All samples were packed by machinery, 
except those from packer C, which were packed by hand, using a 
Bsiall scoop. 
METHODS OF ANALYSIS 
AVAILABLE CHLORINE 
The following well-known method devised by Penot, described in 
most standard textbooks on analysis, was used for the determination 
of available chlorine. 
Weigh 7.092 grams of the thoroughly mixed sample into a mortar 
and triturate with 30 to 40 cubic centimeters of water. Add more 
water and allow the insoluble residue to settle. Pour the clear solu- 
tion into a liter volumetric flask, and repeat the trituration until only 
a silicious residue remains. Rinse the mortar and pestle, catch the 
wash water in the flask, dilute the solution to the mark, and mix. 
Immediately pipet a 50 cubic centimeter aliquot into a 200 cubic 
centimeter Eiineyer flask and titrate with 0.1 N sodium arsenite 
solution, using starch-iodide paper as an outside indicator. The 
number of cubic centimeters of 0.1 N solution consumed gives di- 
rectly the percentage of available chlorine in the sample. : 
Prepare the sodium arsenite solution used for these determina- 
tions by dissolving in water the required theoretical quantity (4.948 
grams) of resublimed arsenious oxide and 10 grams of anhydrous 
_ sodium carbonate for every liter of standard solution to be made. 
Standardize the solution by comparing it with a standard 0.1-N solu- 
_ tion of sodium thiosulphate, titrating both the sodium arsenite and 
the sodium thiosulphate solutions against a known quantity of 
standard iodine solution. Standardize the thiosulphate solution by 
titrating it with 0.1 N potassium permanganate solution according 
to the method described by Treadwell and Hall (13). Standardize 
the permanganate in the usual manner against pure sodium oxalate 
obtained from the Bureau of Standards, United States Department of 
Commerce. ] 
This roundabout method of standardizing the sodium arsengte 
solution was adopted in order to have it based upon a recognized 
Government standard. 
CHLORIDE CHLORINE 
The chloride chlorine was determined from the solution prepared 
for the determination of available chlorine by the following method 
described by Lunge (4): 
After the sodium arsenite titration has been made, add a small ex- 
cess of nitric acid, neutralize the solution with calcium carbonate, 
