Prices furnished by the manufacturer were used in all cases as the basis for the 

 calculations found in the last double column, headed "Cost of 100 pounds of effective 

 oxides in car lots f. o. b. kilns." In estimating probable cost on a delivered basis, 

 freight costs, from location of kiln to destination where used, must be computed. 



In Table II the column headed "Pounds of effective oxides in one ton" is calcu- 

 lated as in Table I, save that the degree of fineness of the limestones is taken into 



Per 

 cent 



Paselng 

 20 mesh 

 aiavs 



Passlog 

 40 Be ah 



Grangers Uanufacturing Co, 



P"»nal Lime Co. 



The Stearns Une Co. 



C. L. Uillar 



Breaer 1 Co. 



Dooald U. Sniih 



F. E. Conley Stone Co. 



Producers Sales Co, 



Fineness of Ground Limestone, 



consideration. It is probable that an3i,hing passing a 20-mesh sieve is effective during 

 a five-j^ear period, while material not passing a sieve of this size is not fully effective. 

 We have assumed that any portion failing to pass this sieve will be only 50 per cent 

 effective during the same period. 



In both tables the figures in parentheses following the brand name show the number 

 of samples collected and inspected. 



