CHEMICAL DATA. 



TABLE 4. Sulphur trioxid and ash in foliage of trees around smelter. 

 [Calculated to dry basis.] 



15 



a On outer edge of area acknowledged by company to be injured; all other samples were taken 



NOTE. By uninjured trees are meant those that show no discoloration or drying of leaves; 

 they may, however, be somewhat stunted. By injured trees are meant those that show some 

 discoloration, drying of leaves, and other unhealthy symptoms. 



