156 Tin Zinc Lead Brass. 



44. Tin ore is obtained principally from the 

 mines of England, Australia, the Malay 

 Peninsula, and two islands, Banca and Bil- 

 liton, which lie southeast of that peninsula. 



45. In Cornwall, the most southwestern county in 

 England, are hundreds of mines of tin and copper, some 

 of which extend far out from the shore and under the bed 

 of the ocean ; in these the moaning of the restless waves 

 overhead is always heard, and their roaring while a storm 

 iasts is fearful to listen to. 



46. Tin is white and bright, but too soft for ordinary 

 use; therefore, sheets of iron are dipped into melted tin, 

 enough of which adheres to the iron to form a thin white 

 coating. Sheet-iron thus coated is the substance of which 

 tin cups, pans, etc., are made, and with which the roofs of 

 some houses are covered. You see, therefore, that a tin 

 cup is really made of iron. 



47. Bronze and bell-metal are made of copper and tin 

 mixed together. Brass is made of copper and zinc 

 mixed together. There are, consequently, no mines or 

 ores of brass or bronze. 



48. Zinc is a metal of a bluish gray tint. It is exten- 

 sively mined in several countries in Europe, and in the 

 States of Wisconsin, Missouri, New Jersey, and 

 Pennsylvania. 



49. Lead is mined very extensively in Wisconsin, 

 Illinois, Iowa, and Missouri. It is used in roofing 

 houses, lining tanks, and in making bullets, shot, and wa 

 ter-pipes. 



50. Lead pencils are made of a mineral called plumba- 

 go, which is not lead, but a kind of coal. Extensive 

 mines of this substance are found in England and Si- 

 beria. 



