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On the Sulphuret of Lime as a Manure. By Dr. Isaac 

 Chapman^ of Bucks County, ( Penn.J 



Wright stoxvn, fB. C.J Dec. 29th, 1818. 



Some years ago I made some experiments with sul- 

 phuret of barytes as a manure, which had very great 

 effect in promoting vegetation, and hkewise preventing 

 insects from injuring vegetables, some of which experi- 

 ments are publibhed in the Memoirs of *' The Philadel- 

 phia Society for promoting agriculture," vol. III. p. 120, 

 and subsequent experiments have fully confirmed what 

 is there stated. 



In the year 1817, several species of insects in the cat- 

 terpillar state, did great injury to the young plants of 

 Indian corn, destroying whole fields, and I apprehended 

 their return in 1818. With the intention of preventing the 

 evil, and in the expectation that sulphuret of lime would 

 act as a manure in the same manner as sulphuret of 

 barytes, I procured a quantity of sulphur and lime, pre- 

 pared my sulphuret, and when planting corn, had about 

 one-third of a table spoonful scattered on the grains of 

 corn in each hill, before they were covered. The yomig 

 plants made their appearance above ground about the 

 same time as in those rows not sulphuretted, several 

 being left in that state, but the difference soon became 

 apparent, and continued throughout the season ; and 

 when the corn was gathered, from viewing the different 

 ^o^^s, it vAas supposed those sulphuretted would yield 

 near one-ihird more than those not so treated. 



To determine the point I had a number of the rous of 

 the corn that were sulphuretted, and those not thus 

 treated, measured, and, to be more accurate, I weighed 



