Few men keep doing so much for horticulture as Mr. Peter Henderson does, by his shrewd, practical common sense. He may sometimes get wrong, but he is generally right, and always does good. In a recent paper on " Delusions," he shows up the notion that plants in sleeping rooms are injurious ; that money is to be made from the business without practical knowledge of the business ; that there is much special virtue in special manures for special crops; that plants take more nitrogen from insects than they can get from the atmosphere in the ordinary way; that the production of variegated leaves by inoculation is a proof of the truth of graft-hybridism, and some other notions of similar character. Let us hope that Mr. Henderson will keep at it. There is plenty of such work to be done yet.