: I'M 



Tl mp from which the raw materials are obtained shows 



p to bottom, approximately as follows: 



Thickness 

 Id feet 



Muck 1 2 



per bed white marl 4 7 



v to brown marl 4 V 



1 1 



lay 2 5 



As might be expected from the relative color of the marls, the 

 material from the lower bed shows, on analysis, more organic 

 matter than that from the upper bed, for which reason more of 

 it must be used, with the same amount of clay, than of marl 

 from the upper bed. This distinction is accompanied by other 

 slight but rather constant differences in chemical composition, 

 which have also to be taken into account in the preparation of 

 the cement mixture. 



Analyses of the raw materials follow. Those marked 1 and 3 

 are quoted by Ornnmings, 1 while 2 and 4 were recently furnished 

 me by the company: 



Marl Clay 



12 3 4 



si0 2 .26 .20 40.48 42.85 



£"# \ .1 - 21 j 20.05 J 13 ' 51 



°a > .Oil | 4.49 



CO 94.39 91.03 25.8 22. 66 



M« .38 .4 .99 G.92 



K 2° 3.14 3.08 



f i 2.85 



Organic 1.54 1.68 



ws • 1.54 1.68) 



Water + loss 3.1 6.3 J 8 " 5 *•'•• 



Tt will be noted that the clay used here runs higher in lime 

 any other used in the state, the nearest approach to 

 • Bhown by that of the clay used at Way- 

 * carries a little less than 20£ of lirrm M Wlim M 4» 



1 -^' ts, p. 2.".T. 



