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44 In October the doubling had sensibly progressed. The double visions were more frequent, and the ground between the twin lines had grown lighter. By November the doubling was unmistakable, and the mid-clarification had become nearly complete. It is to be remarked that the doubling did not involve the Fons Juventae and the canal leading to it, both of which lay well to the right of the Ganges. The space included between the East and West Ganges was very wide, some six degrees. The canals themselves were, so far as could be seen, quite similar, and about a degree, or 37 miles wide. Both started in the Gulf of the Dawn, and ran down to the lower Lake of the Moon, one entering each side of the lake, or oasis. Two thirds of the way down both similarly touched the sides of another oasis, an upper Lacus Lunae. The whole length of each was 1200 miles. Except for fleeting suspicions of gemination, and for possible doublings like the parallelism of the Styx and the Hades, the next canal to show double was the Nectar, which was so seen by Mr. Douglass on October 4, and under still better seeing, a few minutes later, the doubling was detected by him extending straight across the Solis Lacus. In the Solis | Lacus this ¥ was evidently a case of mid-clarification. What occurred i in the AT 4 ene | Das Des Se AA. ete eat ed et Glimpses of a dual state in these canals were caught during the summer and autumn, but it was not till the November presentation of the region that they came unmistakably twinned. On the 18th of that month, just as the twilight was fading away, the air being very still and the definition exceptional, so soon as the sunset tremors subsided, the Euphrates and its neighbor the Phison showed beautifully doubled, exactly like two great railroad tracks with bright ground between, each set extending down the disc for a Ati. 22 2 ann 1 After that evening, whenever the seeing was good enough, they continued to present the same appearance. Now with them no process of midway clarification, such as had taken place in the Ganges, had previously made itself manifest. They had indeed not been very well defined before duplication occurred, but apparently sufficiently so not to hide such broadening had it taken place; for though the twin canals were not as far apart as the two Ganges, they were quite comparably distant, being, instead of six, about four and a quarter degrees from each other. Evidently, the process was, in the case of the Euphrates at least, under way in October, and even earlier, but was not well seen because the twin canals were not yet dark enough. There seem, I may remark parenthetically, to be two other double canals in the region between the Syrtis Major and the Sabaeus Sinus, one to the east of the Phison, and another between the Phison and the Euphrates, both debouching at the same points as the WM 2 ae a ate On the 19th of November I suspected duplication in the Typhon, another canal in the same region. It looked to be double, with dusky ground between. Nectar seems more allied to the second class of manifestations, such as happened later with the Euphrates and the Phison. distance of 1600 miles. Phison and the Euphrates themselves. :