A weekly periodicity is very definitely shown by A.N.'s data. Sunday once more stands at the head of the week as regards frequency, in this case very decisively. The figures are as follows:-- Sun. Mon. Tues. Wed. Thurs. Fri. Sat. 48 21 24 35 28 26 27 In another case which has reached me from the United States, the data are slighter, but deserve note, as the subject is a trained psychologist, and I quote the case in his own words. Here, it will be seen, there appears to be a tendency for the ecbolic cycle to cover a period of about six weeks. In this case, also, there is a tendency for the climax to occur about Saturday or Sunday. "X. is 38 years old, unmarried, fair health, pretty good heredity; university trained, and engaged in academic pursuits. He thinks he may have completed puberty at about 13, though he has no proof that he was in the full possession of his sex-powers until he was 15 years 3 months old (when he had his first emission). His sex life has been normal. He masturbated somewhat when he slept with other boys (or men) during early manhood, but not to excess. "During the autumn of 1889 (when 28 years of age) he observed that at certain times he had an itching feeling about the testicles; that he felt slightly irritable; that the penis erected with the slightest provocation, and that this peculiar feeling usually passed away with a nightly emission. Indeed, so regular was the matter that he usually wore a loin garment at these times, to prevent the semen getting on the bedding. This peculiar feeling ordinarily continued for two or three days. He recalls at these times that he felt that he would like to wrestle with some one, for there seemed to be a muscular tension. These states returned with apparent regularity, and the intervals seemed to be about six weeks, though no effort was made to measure the periods until 1893. The following notes are taken from the diaries of X.:-- "Thursday, December 29, 1892. The peculiar feeling. (This is the only entry.) "Thursday, February 9, 1893. The peculiar feeling. (The diary notes that X. awoke nights to find erections, and that the feeling continued until Sunday night following, when there was an emission.) "Friday, March 27, 1893. The peculiar feeling. (The diary notes that there was an emission the next night, and that the feeling disappeared.) "Wednesday, May 3, 1893. The peculiar feeling. (The diary notes that it continued until Saturday night, when X. had sexual relations, and that it then disappeared.) "Wednesday, June 14, 1893. The peculiar feeling. (The diary states that the next night X. had an emission, and the disappearance of the feeling.)