The New England Farmer states that it is impossible to cultivate any kind of plums with success in our climate, unless salt enter liberally as an ingredient of the compost for fertilizing the trees. When salt is applied mixed with house ashes, there appears to be no difficulty in producing healthyplum trees. Plum trees should be washed once or twice every year with salt brine, and the ground around the roots should be kept clean and free from grass and weeds. We shall continue the subject of gas-lighting next week, being obliged to pottpone the second article for want of space.