46 



RESEARCHES UPON ATOMIC WEIGHTS. 



DENSITY OF MANGANOUS CHLORIDE. 



In order to find the vacuum correction for manganous chloride the density of 

 the salt was determined by displacement of toluol. This was done with the 

 special pycnometer which was devised for the determination of the densities of 

 hygroscopic salts.^ 



Weighings were made with the precautions usual in exact work. All weights 

 were reduced to the vacuum standard by appl3dng the following corrections 

 for each apparent gram of substance: 



RESULTS AND DISCUSSION. 



Richards and Wells have proved beyond question that the ratio of silver to 

 silver chloride is as low as 75.2634,^ a value which is essentially identical with 

 that obtained from the weights of silver used and the weights of silver 

 chloride obtained. Ag : Agci. 



Analyses i and 8 75.2615 



2 " 9 75.2662 



3 " 10 75.2628 



4 " II 75-2607 



5 " 12 75-2595 



6 " 13 75.2662 



7 " 14 75-2656 



Average, 75.2632 



Not only are the values obtained in the two series of analyses identical, but 

 they differ only by an exceedingly small amount from those resulting from 

 the analysis of manganous bromide (pages 42 and 43). 



^ Baxter and Hines: Amer. Chem. Jottr., 31, 220 {igo4), 



2 Schroder obtained the value 2.478. Dichtigkeitsmessungen. Heidelberg, 1873. 

 Pub.Car.Insi.,'No. 28,65 (1905); Jour. Amer. Chem. Soc, 27, 520; Zeit. anorg. Chetn., 

 47, 125. 



I 





