20 GEOLOGICAL SURVEY OF ALABAMA 



been estimated to be 7,000,000 pounds, or 3,500 short 

 tons, of which amount the United States consumed 1700 ; 

 Germany, 800; Great Britain, 400; India, 400; France, 

 100 ; Italy, 50 ; and all other countries 50 short tons under 

 approximately normal conditions obtaining during the 

 period indicated. Present consumption when known will 

 reflect the increase due to the large and continuously 

 world wide expansion of the electrical industry. 



No reliable figures have ever been available as to the 

 total amounts of world's consumption of mica splittings, 

 which in 1919 was estimated as being 1111 short tons, of 

 which aggregate estimate, India is stated as utilizing 

 663; Canada, 376; and the United States only 72 short 

 tons. 



No accurate figures showing the- actual consumption of 

 scrap and of ground mica are available, either of world 

 utilization, or in the United States, the actual consump- 

 tion being greater than is recorded by reason of the in- 

 crement derived from mica trimming, entering into the 

 estimates of mica production as uncut mica. 



*From 1910 to 1918 inclusive, the estimated annual 

 average amount of ground and scrap mica consumed in 

 the United States was 4401 short tons, the average an- 

 nual production for the same period being 3774 short 

 tons. 



Classified as to its uses, the relative percentages of 

 ground mica sold in the United States for various pur- 

 poses in 1918 (the quantity sold being 50 per cent, in 

 excess of the reported production), were as follows: 



Patent roofing 60 



Wall paper 21 



Manufacture of automobile tires 8 



Fancy paints, concrete facing, Christmas tree snow" 3 



Molded electric insulation .:. 3 



Annealing, filler for rubber goods (other than tires), printing 



lithography, sizing cotton, etc 3 



Lubrication, oils, greases and metal bearings 2 



100 



'U. S. Geological Survey Mica in 1918. 



