In July, 1896, Dr. E. W. Claypole, then of Buchtel College, Akron, Ohio, asked me how general was the belief that one seed of the cocklebur grew one year and the other the next year or later. Inquiry of about twenty of the older residents resulted in procuring no information touching the same. In 1897, I was told by a German farmer that one seed only grew one year and the other later, never both at the same time. A short time after I noticed the statement of A. D. Selby in Bulletin 83, (page 353) Ohio Experiment Station, as follows: “Prof. Arthur has recently shown that only one of these seeds can be caused to germinate the first year, the other always remaining until the second year.” This was a confirmation of the German’s claim, yet I determined to investigate for myself. I carried on the experiment for three years with the following results: In 1898, I planted 1000 burs; 917 grew two plants to the bur. In 1899, I planted 1000 burs; 921 grew two plants to the bur. In 1900, I planted 1000 burs; 913 grew two plants to the bur. Total three years, 3000 burs; 2751 grew two plants to the bur. Of the remaining 249 burs some grew one plant, some none; some had one, some had two apparently sound seeds. I regret that no further notice was taken of these seeds. The _only_ object was to determine whether the two seeds _could_ be made to grow at the same time. An account of the work was sent to Professor Selby, asking whether further experiment was necessary; he replied that he thought not. Perhaps it should be added that I selected only apparently sound burs; soil was taken from a field near a creek where cockleburs grow abundantly. It was passed through a ¼ inch-mesh wire sieve, and carefully searched over with the aid of a glass. This soil was taken to a distant part of the farm; in it the seeds were planted and nature did the rest. I also made observations as follows: I searched among specimens growing for a mile along a creek, for two plants growing together and not nearer than five inches to any other plant. Of the 1500 specimens examined each year for three years, two plants always grew from one bur. Why have I obtained such opposite results as compared with Professor Arthur’s? Can it be referred to locality, soil, or some other more favorable conditions?