1847.] The Limestones, and Lime. 81 



Taconic Limestones of Maine — Analysis by Jackson. 

 Limestone of Clinton; color, gray, pyiitous; the Caustic lime 

 brown. 



Jlnalysis. 

 Insoluble slate, _ _ _ - 17.2 

 Peroxide of iron, _ . _ 6. 



Carbonate of lime, . _ _ 76.8 



100. 



The limestone is enclosed in strata of slate, whose strike is N. 

 48^ E.; dips. E. 76°. 



Limestone of Foxcroft; color light blue, sparry and pyritous, 

 and embraced in Taconic slate. 



100. 

 Per cent of lime, 19.9. This limestone is too poor for caustic 

 lime, but will answer as a flux for smelting iron ore. 

 Guilford limestone; color dark blue. 



100. 



Per cent of lime, 47.6. Lime from this locality is esteemed, 

 and bears a full red heat, and makes white lime. 



Thomaston limestone, Beechwood quarry; color white and 

 gray, and sometimes these are arranged in stripes. 



Analysis. 



Carbonate of lime, _ _ _ 55.6 



Insoluble matter, - - - _ 2.8 



Carbonate of magnesia, - - 39.4 



9.78 



Per cent of lime, 31.2. Makes good mortar. 



The Thomaston limestone is equivalent to the Stockbridge 

 limestone, in Berkshire, Mass., and interstratified with the slate, 

 which is equivalent to the magnesian slate. 



Vol. v., No. 10. 6 



