444 0/1 tlte Byyrai-o SI ay -Preventer, Sj'c. 
Henceforward I never intend to plant a cut set of this Potatoe, nor a 
whole one of very small size. I trust that my experiments on each va- 
riety that I plant, during the current season, will be conducted with a 
degree of precision and exactitude that may enable me, on a future 
occasion, to announce their particular routine and final results in a way 
that shall leave no doubt of the efficacy of Mr. Knight's mode of culture. 
With all 2;ood wishes, 
Believe me. Gentlemen, 
Your sincere Friend, 
February \\), 1832. G. I. T. 
Article VII. — On the '"'' Bygrave Slug-Preventer ^ — the 
'"''Bygrare Pink-Hoop;'''' — on Supporting Dahlias; — and 
on Bone Manure. By A Practical Gardener. 
Gentlemen, 
Refering to a former communication of mine, on the 
subject of the "Bygrave Plant Preserver," (page 150) I have now the 
satisfaction of informing you, that by a new application of the principle 
of that invention, Miss Louisa Bygrave has rendered the protection of 
whole beds of plants, fi-om slugs and snails, a matter of easy accom- 
plishment, at a moderate expense. Models of corner and side-parts 
of the contrivance, accompany this letter, in the hope, that with your 
usual liberality, you will give an engraving of them in the Horticul- 
tural Register. 
By way of distinction from the i'urmer invention, this has been named 
the "Bygrave Slug Preventer," [fig. 71, o] and may be described in 
words, as a leaden gutter (h) an inch and a quarter broad, having a 
keel an inch and a half deep, and made in pieces of any desired length ; 
M'hich when set completely round the edges of a bed, and -staunched 
at the joints with soft-solder or putty, and filled with salt, forms a 
barrier impassable by slugs or snails. 
When the article is used, either slices of turnip, peas-haulm, cab- 
bao'e-leaves, or pieces of board, tile, or slate, should at the same time 
be placed here and there on the ground inclosed, for the vermin to 
harbour under, — from whence, they ought every morning to be hand- 
picked, or destroyed by sprinkling a little powdered quick-lime over 
them. Persevering thus for a very few days, would completely clear 
the space within the boundary of salt, of those mischievous creatures, 
and leave it secure from fresh incursions. Of course, these means 
should when practicable be pursued previous to sowing seed, or put- 
ling in young plants. 
