THE BARITE DEPOSITS OF MISSOURI 105 



31. In artificial driftwood salts. 



32. In loading ropes. 



33. In dressing for surface of asphalt pavement. 



34. In filler for wood preservatives. 



35. In roofing. 



36. To give weight to paper. Since Bible paper has been 

 introduced, it is used less. 



37. In various glasses, as rolled glass, hollow ware, crystal 

 and table glass. Jena phosphate crown glass contains 

 28 per cent of BaO and 60 per of P2O5. 



38. In manufacture of commercial chromegreen, 



39. Reported as used as an adulterant in flour, sugar and 

 candy, especially certain French candies. 



This long list shows the many uses to which this material is 

 put. Many of these uses are merely to give weight to the product 

 sold which is ordinarily light. Such cases are in the manufacture 

 of paper, fabrics, rubber, insecticides, fertilizers, ropes, etc. In 

 other instances, it is used because the mineral takes a color stain 

 uniformly and this makes a small quantity of dye cover a large 

 surface. Its use in the paint industry has been known for fifty 

 years or more. Certain special paints contain large amounts of 

 BaS04, as the following : Venice white lead has 50 per cent ; 

 Hamburg white lead has 66 per cent; Dutch white lead has 75 

 per cent. Barium salts in glass increase the specific gravity, ten- 

 acity, elasticity, and refractive index. 



Future of the barite industry of Missouri. — A statement as 

 to the probable future production of barite in Missouri is so de- 

 pendent upon the price of the mineral that these remarks are 

 merely suggestive. If the price is maintained at its present high 

 level, the production will increase in two different ways: (1) the 

 older areas will be carefully searched for barite, and (2) the out- 

 lying fields v/ill send a large production to market. The future 

 development of these outlying areas depends entirely on the 

 market, or upon improved transportation facilities. At the pres- 

 ent time, they are so far from the railroad that only the very 

 highest prices will lead to their development. Should a railroad 

 reach these fields, they would become very important producers, 

 for many of them are as yet scarcely touched. 



