ae ithe Lied 
oh the Vegetative Efficacy of Sulphur. 209 
» 
oak Res 
to ferment, we shall ameliorate the nature of the vines ; 
and produce the quality of those grapes, which are cul- 
tivated on grounds filled with volcanic matter. It is, at 
least, worth the expe iment. ” [Extracted from the An- 
nals of Arts and Me f ce nufactures. 1809. ] 
I have, on garden plants, long and eee used flour 
of sulphur (on melon vines particularly) to destroy or 
expel the grubs and flies. I have perceived them to 
thrive, but attributed their vigour to their being freed 
from annoyances..I have also used sulphur water on 
fruit trees; to banish or destroy aphides. I plaister 
most plants; and therefore have supposed, that the 
gypsum alone had benefitted them. A small infusion of 
oil of vitriol (suLPHURIC ACID) in a large proportion of | 
water, promotes vegetation in, and banishes insects 
from, garden plants. It would be well to make some 
experiments with the sulphur alone ; or combined as the 
memoire mentions, on a variety of plants: on those of 
the trefoil tribe especially. Ido not see why the sul- 
phur, in substance, should not produce effects similar 
to. those of its derivative—sudphuric acid. But plaister— 
is, with us, cheaper; and in § 
reater plenty. 
In page 98, Rotana ne Slt PLAL 
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