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On the N. there is a curious mountain group, also of considerable altitude, and on the W. an irregular depression surrounded by a dusky area. North of Fontinelle, extending towards Goldschmidt and the limb, Schroter discovered a very wide irregular valley which he named "J.J. Cassini." It is really nothing more than a great plain bounded by ridges. At 9 h.
He was not one of the regular young dare-devils, towards whom he adopted a calm observant attitude, while they were all fond of him and glad to see him. I made a real friend of this Schroter, although he was much older than I was.
Schroter, to have the kindness to spend a day or two at Weimar, and to bring with him, if possible, a functionary of the Jena Museum, Farber by name, who had at one time been Schiller's servant. As soon as they arrived, Goethe placed the matter in Schroter's hands. Again the head was raised from its pillow and carried back to the dismal Kasselgewolbe, where the bones still lay in a heap.
The Dorfel Mountains, between S. lat. 80 deg. and 57 deg. on the eastern limb, include, if Schroter's estimate is correct, three peaks which exceed 26,000 feet. On the eastern limb, between S. lat. 35 deg. and 18 deg., extend the Rook Mountains, which have peaks, according to Schroter, as high as 25,000 feet.
For upwards of two centuries ideas on the subject were either retrograde or stationary. What were called the "proper motions" of spots were, however, recognised by Schröter, and utterly baffled Laugier, who despaired of obtaining any concordant result as to the sun's rotation except by taking the mean of a number of discordant ones.
We are almost equally sure that Venus, as that the earth is encompassed with an atmosphere. Yet, notwithstanding luminous appearances plainly due to refraction during the transits both of 1761 and 1769, Schröter, in 1792, took the initiative in coming to a definite conclusion on the subject.
These distinguishing titles, as adopted by Schroter, Lohrmann, and Madler, and accepted by subsequent observers, are WALLED-PLAINS, MOUNTAIN RINGS, RING-PLAINS, CRATERS, CRATER-CONES, CRATERLETS, CRATER-PITS, DEPRESSIONS. WALLED-PLAINS. These formations, approximating more or less to the circular form, though frequently deviating considerably from it, are among the largest enclosures on the moon.
By the efforts of Bode, Olbers, Schröter, and Von Zach, just and elevated ideas on the subject were propagated, intelligence was diffused, and a firm ground prepared for common action in mutual sympathy and disinterested zeal. They received powerful aid through the foundation, in 1804, by a young artillery officer named Von Reichenbach, of an Optical and Mechanical Institute at Munich.
From a rediscussion of these somewhat doubtful observations Bessel inferred that Mercury rotates on an axis inclined 70° to the plane of its orbit in 24 hours 53 seconds. The rounded appearance of the southern horn seen by Schröter was more or less doubtfully caught by Noble , Burton, and Franks ; but was obvious to Mr. W. F. Denning at Bristol on the morning of November 5, 1882.
They are very plentifully distributed round the margin and in other parts of the former, which includes besides one of the longest and loftiest on the moon's visible surface the great serpentine ridge, first drawn and described nearly a hundred years ago by the famous selenographer, Schroter of Lilienthal.
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