168 THE ATOMIC WEIGHTS. 



€lectrol3'zed in a platinum dish. Six determinations are published, out 

 of a larger number, but without reduction of the weights to a vacuum. 

 The data, with a percentage column added, are as follows : 



Mean, 92.594, ±0003. 



Various sources of error were detected in these experiments, and the 

 series is therefore rejected by Hardin. It combines with previous series 

 as follows : 



Turner 92.614, rh .0050 



Erdmann and Marcliand 92.5996, d= .0015 



Hardin 92. 594, zfc .0003 



General mean 9^.595, it .0003 



Hardin also studied mercuric chloride, l^romide, and C3'anide, and the 

 direct ratio between mercury and silver, with reduction of weights to a 

 vacuum. Electrolysis was conducted in a platinum dish, as usual. 

 With the chloride and bromide, the solutions were mixed with dilute 

 potassium C3'anide. The data for the chloride are as follows, the per- 

 centage column being added by myself: 



Weight HgCl-i. Weight Hg. Per cent. Hg. 



.45932 .33912 73.831 



.54735 .40415 73838 



.56002 .41348 73.833 



.63586 ■ .46941 73.823 



.64365 .47521 73.831 



.73281 .54101 73.827 



.86467 .63840 73.832 



1.06776 .78825 73.823 



1.07945 .79685 73.820 



1.51402 1.117S0 73.830 



Mean, 73.829, rb .0012 



Combining this with the earlier determinations, we have — 



Turner 73.791, ± .0050 



Millon , 73.845, ± .0100 



Svanberg 73.795, ± .0060 



Hardin 73-829, ± .0012 



General mean 73.826, ^h .001 1 



