On Sulphuret of Barytes as a Manure, 123 



tered. When the corn was harrowed I sprinkled some 

 sulphuret about each hill, and that adjoining was plas- 

 tered about the same time : that sulphuretted grew the 

 fastest and was of the deepest green. 



On a gravelly soil, of a reddish colour, called 7'ed- 

 shell, I applied on fifty hills of corn when planting, 

 about a tea spoonful of the sulphuret to a hill ; which 

 had a very great effect ; my tenant who farmed the 

 ground, remarked, when the corn was about knee high, 

 that " it appears as if it had been manured with hen 

 dung, the leaves look greasy." 



This corn was of a deeper green than that adjoin- 

 ing, which was plastered, and something larger, and a 

 few hills being left without either sulphuret or plaster, 

 were not half so large, and of a pale yellow colour, 

 when contrasted with the other, and the difference con- 

 tinues to this time (September.) 



4. Finding the insects very troublesome in my 

 garden, on the cucumbers, and likely to destroy them, 

 I applied some of the sulphuret on them, and the in- 

 sects troubled them no more. 



In this application some care is necessary, or it will 

 kill the plants, I had some of the sulphuret dissolved 

 in water and corked up in a phial ; a small quantity 

 of this I put on each plant, which destroyed them. On 

 other plants I sprinkled some of the powder when they 

 were wet with dew, and it injured them very much ; 

 on others I applied the powder when they were dry, 

 and sprinkled some of it on the ground about them, 

 which effectually preserved them from the insect, and 

 did not injure the plants. I may likewise observe. 



