Lote ae , 
Classification of the Elements. 261 
astrophyllite, etc.; titanium in sphene, keilhauite, astrophyllite, 
ete ee i edads 
n) 
compounds with silicon silicates, while at the same time the 
hear relation between these metals and silicon is fully admitted. 
Classification of the Elements. 
Series I. Series Il. Series Ill. 
A. Perissads (Monads). A, Perissads. A. Perissads (Monads). 
Potassium, Sodium, Cxsium, \Nitrogen, | Phosphorus, |Chlorine, Bromine, Iodine. 
Rubidium, Lithium, Thal: | Arsenic, Antimony, 
um, Hydrogen, Silver, | Bismuth, Columbium, 
Gold. Tantalum. 
Boron. 
B. Artiads. — B. Artiads. B. Artiads. 
1. Tron-Atummnum Grovr. 1. Sutpnur Group. 
@ Tron Sus-arour. — Platin- ease 
Nas, ete, Sulphur (8S), Selenium, |b. Oxygen. 
Aum Svs-cnove— | Tellurium,” Molybee . 
Aluminum (g Al) ; also BFe, | BU; also 4Fe, 6Cr, 
BMn, Cr, ete. 3Mn, oV, SW, 5482, 582. 
2. Try Grovr, 2. CarBon-SiLicon GRour. 
Tin, Loma, Zirconium, |Carbon, Pingo, also 7S, 
um; also yH, 7Fe,| Se, 7Te: 
™Ma, yo, YPb, yCu, ph . i 
wat is observed that in this eee three series mS gig 
recognized, which are designated by numbers, series 4, - 
UL They might be called the basic, medial, and acidic series 
or the basic, subacidic, an idic. But it seems as well to cat 
them simply by their numbers, since, owing to the diversities 
