On Gypsum. 59 
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riant bird-foot clover, designated the exact spots where 
the plaistered corn had been planted. 
April 23d. Sowed 16 bushels of plaister on eight acres 
of oats and clover, just up, intending to have a great 
crop, and leaving a slip. Land naturally fine and high- 
ly manured. Drought as above, excessive. Oats bad. 
No difference between the slip and the rest. Clover kill- 
ed. Land ploughed up in September and put in wheat. 
Clover sown in 1807 on the wheat. A heavy crop of | 
wheat, clover plaistered in March 1808, at a bushel to 
the acre; crop very great. No inferiority in the slip un- 
plaistered in 1806. 
1807, March Ist, to 12th. Sowed clover seed on 
one hundred acres in wheat, and 80 bushels of plaister 
the sowers of the latter following those of the former. 
Left a strip of 20 feet. Weather dry, moist, windy or 
calm, and for two days of the sowing a snow two inches 
or less, deep, on the ground. Land stiff, rich, poor or 
sandy, and of several intermediate qualities. The clover 
came up better than any I ever sowed on the surface, 
the strip was a little, and but a little inferior to the ad- 
joining clover, which I attribute to its receiving some 
plaister from the effect of a high wind. The whole field 
received three pecks to the acre in 1808, and was the 
best piece of high land grass of the size I ever saw. 
The wheat received no benefit. 
March 10th. Sowed 40 bushels of plaister on 60 acres 
of poor land, cultivated in corn (Indian) last year, and well 
set with bird-foot clover, leaving an unplaistered slip. 
Weather dry and windy. Effect vast. Strip visible to an 
inch, as far off as you could distinguish grass. The bird- 
