26O NITROGEN. 



Mg = 24. MAGNESIUM. SCHEERER, 1850. 



See pp. 108-115 for a full exposition of all that is essential. 



Mn = 55. MANGANESE. 



Mn O : Mn O4 8 = 71 : 151 =0.47 021. Chg. 35 high. 

 Marignac, 1883, 4 Det., 032 987; 45. Mean 14 low. 

 Weeren, 1890, 6 Det., 005 ooo; 5. l( 19 low. 



Ag+MnO : AgCU Mn = 179 : 227 = 0.78 855. Chg. 9 high. 

 Dewar and Scott, 1883 : 



6 Det., 917 756; 161. Mean 20 low. 



These are the least objectionable methods on chemical 

 reasons. The second shows in execution great range and is 

 atomically dull; the analytical excess represents over 0.2 low. 



This leaves the work of Marignac and Weeren, giving a 

 departure of about 0.05 low. 



Mo = 96. MOLYBDENUM. 



Mo : Mo 03=96 : 144=10.66 667. Change 23 high. 

 Dumas, 1859, Reduct, 6 Det., 741 4955 2 4^ Mean 18 low. 

 Deb ray, 1868, " 3 Det., 604 5035101. " in low. 

 Rammelsberg, 1877, Reduct, i Det., " 41 high. 



Seubert and Pollard, 1895 : 



Reduct, 5 Det., 679 661; 18. " i high. 



2 Na Cl : Na2 O* Mo=: 117 : 206 = 0.56 796. Chg. 27 low. 

 E. F. Smith and Maas, 1893 : 



10 Det. ,760 733527. Mean 51 low 



The work of friend Edgar F. Smith, done by Maas, is 

 very good, giving Mo only 0.2 high. But the direct reduc- 

 tion process, in Seubert's laboratory, gives the identical 

 absolute value; only 0.004 high as limit. 



N = 14 NITROGEN. LORD RAYLEIGH, 1895. 



This most important determination is fully exposed, pp. 

 159-168. 



The ojd Stasian work on this atomic weight is shown up 



