LIKE ALL things living, in the world of mind or of matter, the rose is beautified, enlarged, and strengthened by a course of judicious and persevering culture, continued through successive generations. The art of horticulture is no leveller. Its triumphs are achieved by rigid systems of selection and rejection, founded always on the broad basis of intrinsic worth. The good cultivator propagates no plants but the best. He carefully chooses those marked out by conspicuous merit; protects them from the pollen of inferior sorts; ............