94 
of those of Professor Princep. The one applied his poison to 
the surface of the leaves, which may be said to be the lungs of 
a plant; the other to its roots and wood. We hope that some 
of our friends will extend these interesting enquiries, and favour 
us with the result, that we may publish it for the gratification of 
our readers. 
132 Brugmansia suaveolens. It is not generally known that 
Brugmansia suaveolens, a plant very generally called Datura 
arborea, is nearly hardy, and that it flourishes, and becomes so 
magnificent a plant, in the borders, during summer. To give 
assistance and encouragement to the culture of this plant, we 
will copy a communication of Mr. Spence to the Gardener’s 
Magazine, Vol. 12, 589. “About the first of June, I turned 
the Brugmansia out of the pot, and planted it in the open bor- 
der, with its ball entire ; giving plenty of water at the time, and 
occasionally repeating it at the root, and likewise over the top. 
This, I think, it is best to do in the morning, as the plant is 
not then so liable to flag throughout the day. About a month 
after this, the roots having extended a considerable distance 
from the stem, I allowed the plant to flag a little, by withholding 
water; and then with a spade I cut all round close to the old 
ball ; but first had a quantity of rotten dung ready to be worked 
down with the spade to the bottom of the roots. After working 
in the dung, I gave the ground a good watering, in order to 
moisten the ground down to where the moisture was most wanted, 
instead of letting it remain to be dried up on the surface. In a 
week after this, the plant had made thousands of young roots, 
which found plenty of food close at home. This treatment I 
repeated twice in the season, the last time cutting the roots one 
inch farther from the ball, than the first time. This does not 
injure the plant ; on the contrary, it is surprising to see how it 
will grow immediately after the operation: and another advan- 
tage of cutting off the roots is, that the plant is easily repotted 
in the autumn; provided the diameter of the space included 
within the last cutting be a little less than the pot for which it 
is intended. By the above treatment, this plant (without inclu- 
ding the flowers that were on it in May) has, from the middle of 
August to the end of September, expanded 1050 flowers, each 
of which measures 50 square inches ; so that it has produced in 
six weeks, 52,500 square inches of flowers. The height of this 
