ECONOMICS 2't'i 



Itnmze, solder, etc. It includes the tin content of 

 products made by several plants from tin scrap as tin oxide, 

 putty powders, but mainly tin chloride. The largest recovery 

 of tin is made from the scruff and drosses that are formed in the 

 manufacture of tin and terne plate. Practically no clean scrap 

 tin plate is wasted. A large quantity of tin is recovered in the 

 form of tin powder by electrolytic treatment. Lesser sources 

 of tin are tin foil, block-tin pipe, and old tin cans. The amount 

 of secondary tin recovered from all sources in 1911 was valued 

 at $12,353,040. 



The total value of the imports of tin for 1911 amounted to 

 $43,584,219, which exceeds the value of the importation for any 

 other year. 



The Federated Malay States produces more tin than all the 

 other countries of the world 'combined. The order of the states 

 in the production is as follows: Perak, Selangor, Negri Sembilan, 

 and Pahang. Bolivia is the second producer and Banka the 

 third. The shipments from Banka are to Holland. The 

 output of Cornwall, England, is about 5000 short tons per 

 annum. 



IRON 



According to E. F. Burchard of the United States Geological 

 Survey the production of iron ores for 1912 was between 54,500,- 

 000 and 57,500,000 tons. The quantity represents an increase of 

 approximately 30 per cent, over the output of 1911 which was 

 43,550,633 tons. A high record in the output of iron ores was 

 established in 1910. When it aggregated 56,889,734 long tons. 



The percentage of red and specular hematite mined year after 

 year is increasing. More than 90 per cent, of the iron ore mined 

 for 1912 came from these two varieties of hematite. Limonite 

 and magnetite in about equal proportions contributed the 

 remainder save for a very small percentage of siderite. This 

 mineral ordinarily contributes in America about 0.1 per cent. 



The Lake Superior district produces more than 80 per cent, 

 iron ore. These ores not only supply the furnaces of the Central 

 West but also find their way east of the Atlantic Coast. 



The production of the Birmingham district in Alabama was 

 also largely increased in 1912. For this increase the Clinton 

 hematite of the Red Mountain group was largely responsible. 



