In making experiments to determine these points, all old flowers were removed from the plants in the afternoon or evening and the plants covered with a small “tent” of cheese-cloth. The cheese-cloth was of a mesh sufficiently small to prevent the access of any insects large enough to effect pollination, while large enough to allow a ready circulation of air and good illumination. The following morning pollination was effected between the flowers which had opened by tapping pollen from the large anther onto a clean glass slip and transferring it to the stigma of the same or another flower. The plant was then again covered and allowed to remain so, except when examined from time to time, until the corolla and pistil had fallen off. The following results were obtained from three plants upon which observations were made: PLANT I. August 20. (_a_) Twelve stigmas pollinated with pollen from large stamen of the same flower.(_b_) Cross-pollination effected between two flowers which had opened on a raceme at the same time. August 22. (_a_) Five of the twelve flowers had fallen off. (_b_) One flower had fallen off. The other seemed to be developing. August 24. (_a_) Five ovaries with their corollas fallen off appeared fresh and healthy and seemed to be developing. Two more of the twelve had dropped off. (_b_) Remaining pod seemed to be thriving. August 26. (_a_) Four of the five ovaries were clearly developing. The fifth appeared doubtful. September 13. (_a_) Three fully developed pods remained. (_b_) Development of pod arrested when about half grown. PLANT II. August 20. (_a_) Four flowers self-pollinated as with plant I. (_b_) Cross-pollination effected on seven racemes between flowers which had opened simultaneously on the racemes. August 22. (_a_) All yet on. (_b_) One flower of a pair had fallen off. August 24. (_a_) Two ovaries remained and looked as though they might develop. (_b_) Three pairs fallen off at raceme. The single pod of one pair still remained and looked as though it might develop. All remaining pairs seemed to be thriving. August 26. (_a_) One pod developing; the other doubtful. (_b_) Single pod of pair developing. Two pairs were thriving; one pair was almost grown. The third pair looked doubtful. September 13. (_a_) One pod fully developed; the other fallen off. (_b_) One pair fully developed. One each of two other pairs were fully developed. PLANT III. August 20. Thirteen flowers marked to see if autogamy takes place. August 22. All flowers still on the plant. August 24. All but two flowers had fallen off. One of these seemed to be developing; the other looked wilted. August 26. One pod was thriving; the other had wilted and fallen off. September 13. One pod fully developed.