DR. J. P. JOITLE ON SOME AMALGAMS. 



121 



No. 



Mercury. 



Silver. 



Sp. grav. 



Kemarks. 



I. 



IOC 



52*6 



14-68 



From cold solution of nitrate of 

 silver. 



2. 



3- 

 4- 



5) 



ioo*3 

 ' ii5'4 



II5'2 





Ditto ditto. 

 Ditto ditto. 





J> 



13*^5 



Ditto ditto. 



5. 



JJ 



155-8 



12-34 



Boiled in solution of nitrate of 

 silver. 



6. 



}J 



106-4 



12-49 



From a hot concentrated solution of 

 nitrate of silver. 



7- 



5> 



293-3 



i2'54 



Button of amalgam formed by the 

 electrolytic action of one cell of 

 Daniell's battery. 



8. 



5> 



26i4'o 



11-42 



Crystals formed on the edges of the 

 above button of amalgam. 



From the above Table^ it appears that the amalgam 

 most readily formed by the action of nitrate of silver on 

 mercury is a binary compound^ for the average result 

 gives the proportion of 107 "6 silver to 100 mercury. It 

 will be noticed that the specific gravity of the specimens 

 indicates^ as in the case of the amalgam of copper^ a very 

 considerable contraction of volume^ principally referable 

 no doubt to the assumption of the solid state by the mer- 

 cury, the specific gravity of which comes out 16*5 from the 

 above and succeeding experiments on the amalgam of 

 silver. 



In the next Table I give the composition of amalgams 

 of silver after compression. Before placing it in the press, 

 each specimen was mixed up with excess of mercury so as 

 to form a thick paste. I should mention here, that, on 

 making the analysis, it was found necessary to employ a 

 temperature nearly sufficient to fuse the silver in order to 

 drive from it the last portions of mercury. 



No. 



Pressure. 



Mercury. 



Silver. 



Sp. grav. 



I, 



2^ tons for I day 



100 



3378 





2. 



3 tons for 3 days 





37-76 





3- 



72 tons for I hour 





4C'i3 



i3'6i 



4- 



72 tons for i^ hoiu' 





40 



1378 



5. 



72 tons for i^ hour 





5i'55 



13-44 



6. 



72 tons for 20' 





43*15 





