THE SYNTHESIS OF ARGENTIC CHLORIDE. 



65 



The following table is complete, including all the experiments 

 made with the purest material, and every precaution. The experi- 

 mental work, as well as the preparation work, was the product of 

 more than one experimenter, the senior author having made, from 

 beginning to end, the syntheses numbered R. 2 and R. 3 (as well as 

 R. 1 in the preliminary series),* and the junior author having made all 

 the others. The two experimenters used different balances, different 

 weights separately standardized, and different preparations throughout, 

 in order to secure additional certainty. 



For No. 69, Baxter's silver fused on lime in hydrogen was used; 

 for Nos. 77, 78, 80, 81, 83, R. 2, sample T, fused in the same way; for 

 R. 3, sample V, fused on lime in a vacuum, and for 84 and 85 sample 

 W, fused on lime first in hydrogen and then in a vacuum. 



Synthesis of argentic chloride. 

 FINAL SERIES. 



This result, namely, 132.867 parts of the chloride from 100,000 of 

 silver, has a " probable error," computed according to the method of 

 least squares of about 0.0005. This so-called probable error of course 



*The hydrochloric acid used in these experiments was three times succes- 

 sively treated with small amounts of permanganate and boiled to eliminate bro- 

 mide, and each time distilled. 



