The Farmers' Monthly Visitor publishes the statement of Joshua Dean, who, at the suggestion of the editor of that paper, tried with great success a new remedy which had been used with decided effect by an acquaintance at Nashua. The remedy 1s, " an ounce of hartshorn (sal ammonia) and a pint of soft soap, dissolved in three gallons of water." This is thrown on the foliage and frut with a syringe, in the morning, twice or thrice a week. In the experiment described, a simple tin syringe was used, holding about two quarts, and the preparation was applied at four different times to three plum trees, about as many more being left untouched, The result is, " a dozen plums did not fall" from either of the trees operated on, but they hung so full of fruit, that it was needful to prop the limbs - while not a dozen plums remained upon all the others. This, it appears, was the first crop ever obtained from these plum trees.

It will be observed that sal-ammoniac (muriate of ammonia) was used, and not salts of hartshorn or carbonate of ammonia, a more costly article. The sal-ammoniac was pulverized, and mixed with unslaked lime in equal parts, making it easily soluble in water - the cost being for 1 lb. 15 cents, and two cents more for lime and soap,, or 17 cents for the whole - cheap enough, to be sure, for an effectual remedy, if this only proves such.

This remedy, like many others proposed of late years, is very easily tried, and the possiblity, even, of its success, should be a sufficient inducement. In the case related, it appears to have been eminently successful, but a single trial is insufficient, as other causes may operate at the same time. The application of thin lime-wash has been very highly commended, yet we have found it quite as much labor to keep the young fruit coated with the lime, as to knock down the insects daily on muslin frames. A neighbor who had for years lost all his nectarines, tried the lime remedy very thoroughly, not only syringing the trees, but applying the lime with a brush to the fruit, whenever rains, heavy dews, or the chafing of leaves removed the coating; yet, after spending about three days in the aggregate upon nine trees, he saved only six nectarines from the destroyers. These we afterwards learned were from a tree under which a calf had been kept confined, and whose presence served to frighten the curculios.

If tbe sal-ammoniac remedy operates in the same way, that is by merely serving as a coating, we should very much question its general value ; but if the fumes of the ammonia, which are very strong when the salt is mixed with lime, are the chief repelling influence, it may prove quite efficient. Perhaps the Monthly Visitor can throw some light on this point.