REPORT OP THE DIRECTOR AND STATE GEOLOGIST 1903 149 



analyzed except for manufacturers, and in many cases the writer 

 is compelled to admit that little dependence can be placed on 

 analyses made for the sale of materials. A comparison of the 

 'Circulars sent out by different firms several years ago, shows 

 the material advertised as containing from 80^ to 90^ of pure 

 gypsum, while the material sold by competitors is represented as 

 ■containing from 60^ to 80^. It is safe to say, however, that the 

 average product from the principal working deposits will run from 

 70^ to 75^ gypsum. 



