deficiency of 6.12 per cent. There was an unusually large amount of insoluble 

 silica present (15.87 per cent), indicating that the original limestone was low 

 grade. The ground oyster shell lime put out by the Producers Sales Co. of South 

 Norwalk, Ct., showed a deficiency of 2.60 per cent of calcium oxide. An overrun 

 of only .52 per cent of magnesium oxide left an actual deficiency of over 2 per cent. 

 This product also showed a very high content of sand (17.60 per cent), which 

 accounts for the low lime content noted. 



The following chart shows the degree of fineness of the ground limestone and 

 ground shell lime put out by the various companies. The coarse is that portion 

 which is caught by a sieve having 40 meshes to the inch; ihQJine, that which passes 

 a 40-mesh, but is caught by an 80-mesh sieve; and the very fine, that which passes 

 an 80-mesla sieve. 



Chart Showing Relative Fineness or 

 Ground Limestone from Various Sources 



Coarse 



Fi ne 



Vcru Fine 



New Eng land 

 Li me Co 



;*; 



Summit Limestone 

 Products Co 





^ ■ • I • « • 



Donald U Smith 





'*'*'' '■■''* 



HoosQc Mq rble Co 





Clifford L Miller 



^-^^W^ 

 t^f^' 



Grangers Monu- 

 f act u ri n^ Co 



Con necticut 

 A^sto ne Co., )nc 







\^!'j>M:^y/.\ii 



4< 





_ ■ ! 







Powna I Li me Co 



Bre we r L. Co 



Producers 5ale«Co 



