.\ . MUSEUM 



1.88 



anhydrid .73 



1 and alumina 2.03 



;' the Limestone in Alvord's quarry is : 



1.6 



ixnina and feme ".\i ( l .7 



Lime carbonate 97 



.-iuiiL carbonate 1.11 



This Bame quarry a1?o contains Beveral layers of cement rock, 

 rhich the following are analyg 



Upper layer Lower layer 



Silica 10.97 10.1)5 



Alumina 4.46 5.32 



Tic oxid 1 . 54 1.3 



Lime 27.51 30.92 



sia 16.9 13. G4 



Carbon dioxid 37 . 94 38 . 31 



Tim pompocitmn of the blue lime in the Splitrock quarry of the 

 Solvay co. is as folio 



5.35 



Alumina # 5g 



id # G1 



to 85.41 



Magnesium carbonate 18. 8G 



T pper Helderberg, in Onm K la,£ra is a light gray semicrystal- 

 lini he layers being separated by partings of shale. 



Th< is at times variable in it- character and may at times 



