NITROGEN. 93 



ence, 0.063; Hence 1^=87.655. The weighings are re- 

 duced to vacuum. {Berzelius' Jahresbericht, S^-, 1842, 44 ; 

 Bihl Univ. de Geneve, 4.6, 1842, 363.) 



T. Anderson : 13.95 (0 = 16); 87.204 (0 = 100). 



Determined by four experiments on the decomposition 

 of plumbic nitrate by heat at a sufficiently low temperature 

 to permit of complete decomposition. The number is the 

 mean; extreme difierence, 0.198 for 0=100. Pb = 

 1294.5. {Annal. de Chim. et de Phijs., (3,) 9, 1843, 254.) 



J. Pelouze: U.OU (0 = 16); 87.59 (O = 100). 



A known weight of argentic nitrate was brought. in con- 

 tact with a known and slightly excessive weight of ammo- 

 nium chloride and the excess titrated with silver solution. 

 One experiment gave IST = 175.58 ; a second gave N = 

 174.78. Ag= 1349.01; CI = 443.2. The ammonium 

 chloride was purified bv sublimation and recrystallization. 

 {Paris Comptes Bend., W, 1845, 1047.) 



P. EiNBRODT : i^ (O = 16); 87.5 (0 = 100). 



Experiments on the decomposition of plumbic nitrate by 

 heat gave N =: 87.5 plus a vanishing quantity if Pb = 

 1294.2239. {Leibig's Ann., 70, 1849, 286.) 



J. Dumas : 14 (O = 16). 



Determined by experiments on the combustion of ammo- 

 nia and cyanogen. Particulars not given. = 6; H = 1. 

 {Annal. de Chim. et de Phys., (3,) 65, 1859, 134.) 



J. S. Stas : 14.044 (0 = 16). • 



Stas made seven determinations of the relation between 

 silver and its nitrate by dissolving pure silver in nitric acid, 

 evaporating to dryness and keeping the salt melted until 

 there was no further loss of weight. In two of these experi- 

 ments the salt was melted in vacuo. The mean result was 

 that 100 Ag = 157.472 nitrate ; whence N = I4..O4.O. Later 

 Stas made two more experiments by the same method with 

 all possible precautions to secure accuracy. These gave 100 

 Ag = 157.484 nitrate and N = 14.042. By the conversion 

 of the chlorides of potassium, sodium, lithium and silver 

 into nitrates, Stas found the difference between a chloride 

 and a nitrate 26.5882. This gives N = 14.045. The weigh- 



