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JOURNAL OF THE 



A third table was constructed showing the phosphoric acid 

 extracted by 80 per cent, alcohol, and the percentage of insolu- 

 ble phosphoric acid in the residue from alcohol. The total dry- 

 basis phosphoric acid is taken as 100 from each analysis. 



TABLE No. III. 



THE DRY-BASIS TOTAL P 2 8 IN EACH ANALYSIS IS 100. 



What can be deduced from these results? Let us first con- 

 sider the soluble phosphoric acid, as exhibited in Table No. I ? 

 with a constant amount of total phosphoric acid. Starting at 

 11.81 per cent, at mixing it rises to 13.34 (a gain of 1.57 per 

 cent.) in one week. The highest gain is at the end of the ninth 

 week — 1.81 per cent. — so that we may say that under the condi- 

 tions of the experiment there is but little change in the soluble 

 phosphoric acid after the first week. These conditions were 

 exclusion of air, constant moisture and ordinary temperature. 



