LIME AND CEMENT INDUSTRIES 771 



Tentaculite bed, is seen in Callanan's quarry southwest of South 

 Bethlehem (pL 28), analyses of which are given below. Under- 

 lying the Tentaculite are the Waterlime beds, also exposed at 

 Indian Ladder and in the floor of the quarry at South Bethlehem^ 

 and at both localities they are about four feet thick and represent 

 impure magnesia limestones.-^ 



The following analyses made for this report will indicate the 

 character of limestones of the Helderberg series in Callanan's 

 quarry at South Bethlehem. 

 Lower third of quarry 



Silica 9.05 



Ferric oxid .99 



Alumina ., 6 . 66 



Lime carbonate 79 . 86 



. Magnesia carbonate . ,..,... 4 . 17 



100.73 



Middle third 



Silica :. ., 6 .12 



Alumina , 1 . 45 



Ferric oxid .74 



Lime carbonate 48 . 34 



Magnesia carbonate 2 . 93 



Carbon dioxid ..,.., 41 . 22 



99.8 

 Upper third 



Silica 11.16 



Ferric oxid 1.15 



Alumina 3.35 



Lime carbonate 79.06 



Magnesia carbonate 6.65 



101.37 



^Darton, N. H. Geology of Albany county, {see 18th an. rep't N. Y. state 

 geol. p. 423) 



