Self-fertilization is common, but it is not universal; for any one examining the flowers of vines will find that when the cap of petals falls off in the way described in books and the pollen is dispersed, that the stigma is not receptive, and so any pollen that falls upon it is powerless. Again, the dispersal of the pollen is as likely to produce cross-fertilization of adjacent flowers when others are grown in proximity as it is self-fertilization. The different times at which pollen and stigma ripen, and the occasional absence or defective condition of the pollen, are among the most usual causes of shy setting. This deficiency of pollen we have noted in Dutch Hamburgh, Black Morocco, Balafault, Muscat Noir du Jura, Aramon, Morocco Prince, and Chasselas Musque, but how far this is a common occurrence we do not know. - Gardener's Chronicle.