FINAL MEASUREMENTS WITH ZINC AMALGAMS. 



43 



NO. 16. 



Weight amalgam No. 9 13.101 

 Weight mercury 15-846 



28.997 



?_ 28 -947 x 13-543 . 

 c u " 13.101 13.544 



Ratio of densities 



J log f- = 0.34427. 



^3-543 

 13-544 



Potentials of Zinc Amalgams. Final Series; Very Dilute Amalgams. 

 n of 1-volt cell = 0.9925; t = 23.09 C. 



These results, of great consistency and trustworthiness, make possible the 

 construction of the true curve for D-n- beyond point 2. For this purpose it 

 is convenient to start at point 2, which may be assumed for the moment as 

 correctly placed ; its abscissa is 0.077546, and its ordinate, referred to No. 3 

 by interpolation, is 0.00141 -f- 0.00001 or 0.00142. 



The curve is now extended from point 2 through points 19, 20, and 21 ; 



the ordinate (log 



1.20637), representing nearly enough the true con- 



centration of amalgam No. 22 intersects it at the point 22 ; the value of the 

 ordinate is thus fixed as 0.00160. Starting again from this point, the curve 

 may be extended to amalgams 23 and 24. 









