t 146 ] 



In the fire : fufible be^ 

 fore ignition. 



Solution : in aqua regia, 

 yellow ; (in aqua fortis 

 it difTolves, and pre- 

 cipitates into a white 

 powder.) 



Glafs : white and opaline, 

 difficultly produced. 



31. Plumbum. Lead. Metal: eafily malleable, 



blueifli- white : not fo- 



norous. 

 In the fire : fufible before 



ignition. 

 Solution : in aqua fortis, 



clear water colour. 

 Precipitate : white. 

 Glafs : yellow, 



32. Ferrum, Iron. Metal : very hard, and dif- 



ficultly malleable j ob- 

 fcure blueifh grey co- 

 lour : fonorous. 



In the fire: not fufible 

 till after ignition, and 

 throwing off fparks in 

 a ftronger fire. 



Solution : in aqua fortis, 

 brown. 



Glafs: brown, with a 

 flight greenilh tinge. 



33. Cuprum. Copper. Metal: hard, malleable, 



red, fonorous, 



3 M 



