^ IG NEW YOKK STATE MUSEUM 



Analyses of the sliale have been made and are given below. . 



A green 



COMPOSITION ^fayerT' /"f/ot^Jlf; Red shale Blue shale Clay 

 shale bank t^f^e^n^' 

 shales 



Silica 25.40 54.25 52.30 57.79 45.35 



Alumina 9.46 16.89 18.85 16.15 12.19 



Peroxid of iron. . 2.24 - 5.81 6.55 5.20 4.41 



Lime 22.81 4.34 3.36 2.73 10.99 



Magnesia 10.39 5.21 4.49 4.67 6.38 



Carbonic acid .. . 20.96 4.30 3.04 3.42 7.24 



Potash 95 2.95 4.65 4.11 3.26 



Soda 83 1.35 1.22 1.14 



Water and organic 



matter 7.60 5.01 5.30 4.50 8.90 



Oxid of mangan- 

 ese Trace Trace 



Total 99.81 99.59 99.89 99.79 99.86 



Analyst, Dr H. Froehling, Richmond, Ya. 

 The samples were all dried at 212° F. 



It may be of interest in this connection to give the composition 

 of some other clays found at Warner, which are used in the manu- 

 facture of cement. The following are only partial analyses. 



Silica 45.12 43.19 46.00 41.78 41.70 44.00 



Oxid of iron and 



alumina .... 13 .79 



Lime 12.91 



Magnesia .... 7.21 



14.62 



25.02 



16.09 



18.24 



17.33 



12.36 



7.13 



12.40 



12.71 



11.74 



7.05 



3.67 



5.83 



6.02 



6 . 83 



The last analyses would indicate a rather fusible cb,\. The 

 clay used by the Onondaga co. is dug in a field adjoining the works. 

 It has a pinkish color, stratified and runs about 15 feet in deptli. 



