Also, that the application of ammonia to plants may be attended by results varying according to the conditions under which it is applied, and the object it is desired to obtain. The following is the formula for the solution alluded to in the previous note by Mr. Deane:—Sulphate of ammonia, 7000 grains; sesquicarbonate ditto, 1000 grains; water, 80 fl. oz. Dissolve. Of this solution one fluid once to a gallon of water will make a solution, sufficiently strong for all ordinary purposes.—_Pharmaceutical Journal._ CALENDAR OF OPERATIONS. DISBUDDING.—This operation does not appear to be sufficiently recognised in its proper sense as distinguished from pruning and pinching. In performing these latter operations we remove a portion of the growing shoot, in the former case the young bud is removed as soon as it can be rubbed off. These operations are therefore quite distinct, and their distinction is of much importance. Most fruit cultivators are aware that trees suffer materially by suddenly depriving them of a large portion of foliage while in active growth, and expedients are resorted to in order to render the operation less injurious. In spring when the buds burst, attention should be directed to the quantity of young shoots desirable either for fruit or uniformity of growth; these being secured all others should immediately be _rubbed_ off. As growth proceeds luxuriant shoots are _stopped_ or their points pinched off, removing more or less of the shoot, according to the object to be attained. If the plant is very luxuriant, more leaves may be removed and if _every_ shoot upon a tree is operated on in this manner it amounts to a severe check on its growth. In the case of young trees, or weakly ones, where a certain form is desired, the young growing point should be bruised without removing any of the elaborating foliage, securing density of habit without any perceptible check of growth. Suppose a shoot that has grown 12 or 14 inches to be pinched back one half of its length, the uppermost bud will burst again and the others remain comparatively dormant; but allowing the same shoot to have been checked in its longitudinal growth, by pinching or bruising its extreme point, it will be found that all the lower buds will be benefitted and several additional shoots produced. We have alluded to this subject more particularly at present as we are aware of having occasionally made use of the term _pinching_ when _disbudding_ would have been the more appropriate expression.