no METALS. 



3. Lithium. — The metallic base of lithia. It is the light- 

 est element in nature. Its appearance is white and lus- 

 trous. 



4. Cae'sium. — A metal which was first discovered in Diirk- 

 hcim water, and which has since been found in a rare 

 mineral called pollux. 



5. Rubidium. — A white metal, capable of rapid oxidation, 

 and havint^ a sjx'cific gravity of 1.52. It is present in 

 small quantities in lepidolite, and. was originally discovered 

 in the mineral water of Diirkheim. 



METALS OF THE ALKALINE EARTHS. 



1. Ba'rium. — The metallic base of baryta or baria. It has 

 the color and lustre of silver, but is soon tarnished by the 

 oxygen of the air. 



2. Stron'tium. — The metallic base of strontia. A heavy 

 white metal which oxidizes in the air, and decomposes 

 water at ordinary temperatures. 



3. Cal'cium. — The metallic base of lime. It is solid, 

 rather yellowish, highly lustrous, but tarnishes quickly in 

 the air. 



METALS OF THE EARTHS. 



1. Alumin'ium. — The metallic base of alumina, the chief 

 constituent of clay. It has a white color somewhat re- 

 sembling that of tin. 



2. Glucinium. — The metallic base of the earth glucina. 

 It is of a grayish -black color, and acquires a dark metallic 

 lustre by burnishing. 



3. Yt'trium. — A brittle metal of a dark -gray color, the basis 

 of yttria. 



4. Er'bium. — A metal found in ores of yttrium. In its 

 compounds and properties it resembles the metal alu- 

 minium. 



5. Zirco'nium. — The metallic base of zircouia ; it does not 

 resemble a metal, being like charcoal powder. Heated 

 in the air, it burns with almost explosive violence, forming 

 the oxide. 



G. Cerium. — A metal of a fle.sh-red color, obtained from 

 cerite. It becomes friable from heat, but docs not melt. 



7. Lanthanum. — A metal occurring with cerium in cer- 

 tain minerals. It is of a very pale .salmon color. 



