168 THE ATOMIC WEIGHTS. 



electrolyzed 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 : 



Weight HgO. Weight Hg. Per cent. Hg. 



.26223 .24281 92.594 



.23830 .22065 9 2 .593 



.23200 .21482 92.595 



.14148 .13100 92.593 



.29799 .27592 92.594 



.19631 .18177 92.593 



Mean, 92.594, d= 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, rfc .0050 



Erdmann and Marchand 92.5996, .0015 



Hardin 92. 594, .0003 



General mean 9 2 -595, rb .0003 



Hardin also studied mercuric chloride, bromide, and cyanide, 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 cyanide. The data for the chloride are as follows, the per- 

 centage column being added by myself: 



Weight HgCL v Weight Hg. Per cent. Hg. 



45932 -33912 



54735 -40415 



.56002 .41348 



.63586 .46941 



.64365 .47521 



.73281 .54101 



.86467 .63840 



1.06776 .78825 



1.07945 .79685 . 



1.51402 1.11780 73-830 



Mean, 73.829, .0012 



Combining this with the earlier determinations, we hav 



Turner 73-791, db .0050 



Millon 73.845, .0100 



Svanberg 73-795, .0060 



Hardin 73.829, .001 2 



General mean 73.826, d= .001 1 



