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Updated: May 12, 2025
E. of Eudoxus are two short crossed clefts, and on the N. a long cleft of considerable delicacy running from N.E. to S.W. It was in connection with this formation that Trouvelot, on February 20, 1877, when the terminator passed through Aristillus and Alphonsus, saw a very narrow thread of light crossing the S. part of the interior and extending from border to border.
Trouvelot and Palisa, on the other hand, instituted an exhaustive, but fruitless search for the spurious "intramercurian" planets announced by Swift and Watson in 1878. New information, however, was not deficient. The corona proved identical in type with that of 1882, agreeably to what was expected at an epoch of protracted solar activity.
But beyond this no true macula has ever been seen; for Lahire's reported observation of one in latitude 70° is now believed to have had its place on the solar globe erroneously assigned; and the "veiled spots" described by Trouvelot in 1875 as occurring within 10° of the pole can only be regarded as, at the most, the same kind of disturbance in an undeveloped form.
Trouvelot lost all his worms by pebrine, the germs being imported in eggs received from Japan through M. Guérin-Méneville of Paris. Enough, however, was done to prove that silk raising can be carried on profitably, when due precautions are taken, as far north as Boston. As this moth extends to the tropics, it can be reared with greater facility southwards.
The moth itself is not bad to look at, but its larvae is a great, overgrown brute, with an appetite like a hog. Immediately Mr. Trouvelot sought to recover his specimens, and when he failed to find them all. like a man of real honor, he notified the State authorities of the accident.
If inequalities of surface are in question, they must be on a considerable scale; and a similar explanation might be given of the deformations of the "terminator" or dividing-line between darkness and light in the planet's phases first remarked by Schröter, and again clearly seen by Trouvelot in 1878 and 1881.
Trouvelot appear to remove all doubt as to the true nature of the rings, if indeed any doubt could reasonably be entertained after the investigations made by European and American astronomers when the dark inner ring had but recently been recognised. It may be well to give a brief account of the progress of observation from the time when the rings were first discovered.
Insects eat almost incredible quantities of food when young and growing rapidly. Mr. Trouvelot tells us in the "American Naturalist" that the food taken by a single American Silk-worm in fifty-six days is equal to eighty-six thousand times its primitive weight!
Velocities up to 250 miles a second, or 15,000 times that of an express train at the top of its speed, were thus observed by Young during his trip to Mount Sherman, August 2, 1872; and these were actually doubled in an extraordinary outburst observed by Father Jules Fényi, on June 17, 1891, at the Haynald Observatory in Hungary, as well as by M. Trouvelot at Meudon.
On the other hand, Niesten of Brussels found reason to revert to Vico's discarded elements for the planet's rotation; and Trouvelot, Stanley Williams, Villiger, and Leo Brenner, so far agreed with him as to adopt a period of approximately twenty-four hours.
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