52 THE CONNECTICUT AGRICULTUEAL 



Limestone. 



709. Limestone, quarried about forty years ago. 



710. Limestone, from top of layer. 



Both samples were sent by L. Elliot, Durham. 



Analyses. 



109 710 



Insoluble in acid (sand and soil), 1.84 S.ll 



Lime, 53.91 52.91 



Magnesia, 63 .52 



Phosphoric acid, .08 .12 



Carbonic acid, etc., by difference, 43.54 42.74 



100.00 100.00 



The composition may also be stated as follows: — 



109 TIO 



Carbonate of lime, - -.- 96.14 94.30 



Carbonate of magnesia, 1.32 1.09 



Phosphate of lime, 15 .22 



Silica, etc., insoluble in dilute nitric acid, 1.84 3.71 



Undetermined matters (carbonate of iron ?) and loss,. .55 .68 



100.00 100.00 



These limestones are comparatively pure carbonate of lime. 



Shell Marl. 



698. Shell marl sent by Prof. J. Hoyes Panton, Guelph, 



Canada. 



Analysis. 



Moisture, 24 



Insoluble in acid, 41 



Oxide of iron, - - 29 



Lime, ^ - 53.03 



Magnesia and other matters, 1-07 



Carbonic acid and combined water, - 44.96 



Phosphoric acid, trace 



100.00 



NoEPOLK Fertilizer. 



772. Norfolk Fertilizer. Made by Styron, Whitehurst & Co., 

 Norfolk, Va. Sampled, sent, and sold by M. B. W. Wheeler, 

 West port. 



