245 
I would say that a’ though the soft soap may 
destroy the insect, yet the other kinds, brown or 
mottled soap, will not be found so disagreeable 
nor so injurious to the plants, and as there is but 
little difference in the expense, I should therefore 
recommend them to be used in preference to the 
black or soft soap. 
Muirhead’s method of cleaning* with the 
brush and water will, no doubt, destroy many, but 
it ajipears a very tedious operation, and although 
it may be done ever so carefully many will escape 
it in those parts of the plant where the brush 
cannot be got to. If the sulphur is applied to kill 
those escaping the first operation, I cannot see 
any reason why it may not be done at first, so as 
to prevent the trouble of brushing, for if the few 
are destroyed by it, it would be ridiculous to sup- 
pose that the great bulk would not be liable to 
the same fate, after being immersed twenty-four 
hours in the solution ! If there is any merit in 
the latter method for their destruction, it is not 
produced by the sulphur, but by the insect being 
so long immersed under the water, for unless 
they were either equatic or amphibious animals, 
after so complete a ducking none could escape : 
at all events the sulphur will not destroy them 
the way that it is recommended to be applied, and 
indeed were it destructive to them, this author has 
neglected to mention the proportionate quantity 
of water and sulphur, and left us to find it out. 
He tells us to put a pound of sulphur to a com- 
