NITROGEN. 65 



IMarignac* gives the following weights. I add the quantity of KCl 

 proportional to 100 parts of AgNO.j : 



1.849 grm. KCl ^ 4.218 grm. AgNO.j. 43.836 



2.473 " 5-640 " 43-848 



3-317 " 7-565 " 43-847 



2.926 " 6.670 " 43.868 



6. 191 " 14.110 " 43.877 



4.351 " 9.918 " 43-870 



Mean, 43.858, zh .0044 



Stas' t results are given in three series, representing silver nitrate from 

 three different sources. In the third series the nitrate was weighed in 

 vacuo, while for the other series this correction was applied in the usual 

 way. For the KCl equivalent to 100 parts of AgNOg Stas found : 



First Series. 

 43-878 

 43-875 



43-875 

 43-874 



Mean, 43.8755, ± .0005. 



Second Series. 

 43.864 

 43.869 

 43-876 



Mean, 43.8697, it .0023 



Third Series. 

 43.894 

 43-878 

 43-885 



Mean, 43.8857, ± .0031 



Combining all four series we have : 



Marignac 43.858, zb .0044 



Stas, 1st series 43-8755, =h .0005 



Stas, 2d " 43.8697, ± .0023 



Stas, 3d " , 43.8857,^.0031 



General mean 43-S715, ± .0004 



There have also been determined by Penny, by Stas, and by Hibbs a 

 series of ratios connecting the alkaline chlorides and chlorates with the 

 corresponding nitrates. One of these, relating to the lithium salts, will 

 be studied farther on with reference to that metal. 



*Berzelius' Iveiirbuch, 5th ed., 3d vol., 1184, 11S5. 

 t Aronstein's translation, p. 308. 



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