y 



54 THE CONNECTICUT AGRICULTUEAL 



316 786 



Moisture, ... 16.70 17.64 



Combined water, 3.26 



Sand, insoluble silica, 18.33 



Soluble silica, 26.65 



Oxides of iron and alumina, 23.00 



Lime, — .43 



Magnesia, 3.12 



Potash ._ 5.69 



Soda, 60 



Phosphoric acid, 90 .92 



Undetermined matters, .42 



100.00 

 Cost per ton, $10.00 



The analysis given in the pamphlet (issued by Hoopei- & Co. 

 General Agents) accompanying the sample gives phosphoric acid 

 at 2,8 per cent, and potash at 7.3 per cent. The sample contains 

 but one-third that amount of the former, and as to the latter it 

 exists as a silicate — in the mineral glauconite, which gives the 

 green color to the marl — and is insoluble or very slowly soluble, 

 and accordingly the marl has little effect as an active fertilizer 

 when used in small doses, but rather belongs to the class of 

 amendments which often produce striking results on poor soils, 

 when applied in large quantities. 



This marl has been extremely useful in New Jersey on lands 

 near to market, and but a little way removed from the marl pits, 

 where its cost is but $3 to *5 per ton. To transport it to Con- 

 necticut can hardly be profitable to the farmer here, unless all the 

 circumstances are favorable to laying it on at low cost. 



Marine Mud. 



685. The sample was sent by Wm. T. Foote, Esq., of Guilford. 



Analysis. 



Water. 45.68 



Organic and volatile, 4.54* 



Insoluble in acid (sand and soil),. - 40.97 



Oxide of iron and alumina, 6.14 



Lime, .90 



Magnesia, - .05 



Potash .36 



Soda,... - 56 



Sulphuric acid, -79 



Phosphoric acid, trace 



100.00 

 * Containing nitrogen 0.18 



