The innate tendency of plants to vary, irrespective of any external influences, and of which so much has been made by those who look on this tendency to vary as the primary law in the evolution of new species - receives continual elucidation from new discoverers. A recent contribution is from the pen of Mr. H. Veitch, of New Haven. He shows that wheat is strictly a self-fertilizer - pollinization being effected in the bud - and that it is impossible for the pollen from one plant to reach the stigma of another. Yet, as far as history goes back, varieties of wheat continually appear, and new varieties are being introduced by seedsmen unto this day. These varieties are selected from the crop in an ordinary wheat-field. The plants all grow under the same conditions, and are surrounded by the same circumstances, yet these variations occur under the influence of some hidden law. These variations, once produced, come under the laws of heredity, reproducing themselves with tolerable exactness for a while, but sending out here and there striking departures, which the cultivator selects and preserves when they chance to profit him. - Independent.