LIME AND CEMENT INDUSTEIES 825 



The upper bed is used for building and also for Portland 

 cement, being mixed with the overlying clay; the lower bed 

 makes a high grade of lime. The following analysis represents 

 the composition of the upper stone. 



Silica 3.9 



Alumina 1.3 



Ferric oxid , ! . . 



Lime 52 . 15 



Magnesia ,. 1.58 



Sulfuric acid . . . -....,.. .3 



The composition of the lower bed is as follows: 



Silica 1.1 



Alumina . . . . . . . . . .8 



Ferric oxid ., *. .< .5 



lime 53.17 



Magnesia .75 



Carbonic oxid (est.) . . 45 . 08 



101.4 



The rock has to be carted three quarters to one half a mile for 

 shipment, the distance depending on the auarry from which it is 

 taken. The lime produced is soft but quite pure. It is said to 

 slake rather quickly. 



The analysis of the lime in the circular of the Associated lime 

 co. is: I 



Lime ... 96.46 



Magnesia i. .64 



Ferric oxid and alumina , 1.7 



Loss on ignition 1.2 



An extensive Portland cement plant has been built at this 

 locality and is described in another chapter. 



