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On Plaister of Paris. : 
Query. 9. What is the greatest product of grass per 
acre, you have known by the means of plaister ? 
Answer. As much as from any other manure. I 
I never weighed, or kept an exact account. I think I 
have had five tuns per acre, at two cuttings, in one 
season ; and I have sometimes cut a third crop; though 
I seldom do this, as I prefer feeding the third growth. 
The hay is in my opinion better than that produced by 
dung. The cattle waste less of it. I have dunged part 
of a field and plaistered the residue. The cattle and 
horses will reject the grass on the dunged part, while 
they can get the smallest bite off that plaistered. I have 
never desired over luxuriant crops of grass. The hay 
of these is not so nutritive as that of a moderate growth. — 
The stock will not consume it to advantage, though I 
often salt it. 1 am content if I get a tun and an half, at a 
cutting on the acre. This will stand well to the scythe, 
and does not, like over luxuriant grass, die, rot, or 
become feculent and musty at the root. 
Query 10. Have you ever used it on ground dressed 
with other manure, and what? and the effects if any 
superior to the plaister alone? 
Answer. ‘The answers to five and six comprehend, 
for the most part, what I have to say on this query. 
In England, it is said the plaister fails where the “land 
has been dimed :(-f) that it operates best on virgin soils* 
Cf) It is said in alate English publication, that the gypsum 
chiefly consists of a mineral acid. and a calcareous earth; 
and as the one or the other prevails, itis good or bad. 
* See note page, 48. 
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