Mr. Bizzell writes us that we do not seem to have understood the advantages of the new mode of pruning Grape-vines, as set forth in his letter in our March number. We have read that letter again very carefully, and find that we did not fully comprehend one point relating to this mode of pruning. We are still of the opinion, however, that only the first bunches set would ripen here at the north; its advantages, therefore, would be confined to the south. It would be well, however, to try the experiment under glass here, and we should feel obliged if Mr. B. would go more into detail, and illustrate the modus operandi with drawings.

In an article headed "Sundries," in the November number of the Horticulturist, the writer, in some remarks upon my late article on Graperies and Grape-growing, concludes with the following paragraph:

"I don't quite approve of Mr. Saunders' plan of renewing the whole plant annually, which appears to be rather severe treatment, and must, I should think, eventually enfeeble the plant to an injurious extent".

In reply to this I beg to ask where I have ever recommended this treatment? To cut down the plant annually would, of course, be an unprofitable proceeding with the grape-vine, not that it would kill the plant, but where would the fruit come from? I ventured to recommend a system which I know to be valuable, and which I have no doubt will ultimately become popular, as it is already practised by some successful grape-growers. Manufacturers of reaping-machines paint on the implement a conspicuous notice to "keep the knives sharp;" I wish that manufacturers of pruning-knives would engrave on them the motto, "Summer pruning weakens; winter pruning strengthens".

I received this morning a package of foreign horticultural periodicals, and in scanning them over I found a notice of a remarkable bunch of grapes which had been produced on vines that have been cut down annually, for purposes of propagation, since the year 1811; last year they were not cut down, hence the fruit. Although the plants are none the worse after forty years of "severe treatment," I will not quarrel with your correspondent, but admit that it may "eventually enfeeble the plant to an injurious extent".

I give it up, and admit that Mr. Saunders has the best of the argument, for if a vine is not "enfeebledn after nearly fifty years of annual cutting down, I see no reason to fear that such will be the case afterwards. I used, too, in my remarks upon Mr. Saunders' article, the word "annually" instead of "biennially," (which was of course the proper one,) and ask the forgiveness of Mr. S. for the inadvertence which gave a wrong interpretation to his remarks.