In 1884, before the Royal Society, some notes on the aspect of Mars, by Otto Baeddicker, were read by the Earl of Rosse. They were accompanied by thirteen drawings of the planet and showed many features represented on the Schiaparelli charts. W.F. Denning in 1885, remarked upon "the seeming permanency of the chief lineaments on Mars, and their distinctiveness of outline." Schiaparelli confirmed his previous observations upon the duplications of the canals and Mr. Knobel published some sketches.
In 1886, M. Terby presented to the Royal Academy of Belgium notes on drawings made by Herschell and Schroeter, indicating the so-called Kaiser Sea. M. Perrotin at the Nice Observatory was able to redetect Schiaparelli's canals, which elicited the remark that "the reality of the existence of the delicate markings discovered by the keen-sighted astronomer of Brera seems thus fully demonstrated, and it appears highly probable that they vary in shape and distinctness with the changes of the Martial seasons."
These observations of M. Perrotin were detailed at length in the Bulletin Astronomique, and the distinguished observer called attention to the fact that these markings varied but slightly from Schiaparelli's chart, and indicated a state of things of considerable stability in the equatorial region of Mars. M. Perrotin recorded changes in the Kaiser Sea (Schiaparelli's Syrtis Major). This spot, usually dark, was seen on May 21, 1886, "to be covered with a luminous cloud forming regular and parallel bands, stretching from northwest to southeast on the surface, in color somewhat similar to that of the continents but not quite so bright." These cloud-like coverings were later more distributed and on the three following days diminished greatly in intensity. They were referred by Perrotin to clouds.
In March and April of the year 1886 a study was made of the surface of Mars by W.F. Denning in England. Mr. Denning's drawings corroborated the charts of Green, Schiaparelli, Knobel, Terby and Baeddicker. He found the surface of Mars one of extreme complexity, a multitude of bright spots in places, but with a general fixity of character which led him to believe that the appearances were not atmospheric. He indeed attributed to Mars an attenuated atmosphere and thought that some of the vagaries in its surface characters were due to variations in our own atmosphere He did not find the Schiaparelli canals as distinct in outline as given by that ingenious observer. He noted many brilliant spots on Mars and indicated the disturbing influences of vibrations produced by winds on the surface of our earth in connection with changes in the earth's atmospheric envelope.
In 1888 M. Perrotin continued his observations on the channels of Mars and noted changes. The triangular continent (Lydia of Schiaparelli) had disappeared, its reddish white tint indicating, or supposed to indicate, land, was then replaced by the black or blue color of the seas of Mars. New channels were observed, some of them in "direct continuation" with channels previously observed, amongst these an apparent channel through the polar ice cap. Some of these seemed double, running from near the equator to the neighborhood of the North Pole. The place called Lydia disappeared and reappeared. A strange puzzling statement was made that the canals could be traced straight across seas and continents in the line of the meridian. M. Terby confirmed many of these observations. Later the so-called "inundation of Lydia," observed by M. Perrotin, was doubted. Schiaparelli himself, Terby, Niesten at Brussels, and Holden at the Lick Observatory, failed to remark this change. These observers did not double the canals satisfactorily, but all agreed upon the striking whiteness and brightness of the planet.
M. Fizeau (1888) argued that the Schiaparelli canals were really glacial phenomena, being ridges, crevasses, rectilinear fissures, etc., of continental masses of ice. Again (Bulletin de l'Academie Royale de Belgique, June) M. Nesten averred that the changes on the surface of Mars were periodic.
In 1889, Prof. Schiaparelli reviewed what had been observed upon the surface of the planet in a continued article in Himmel und Erde, a popular astronomical journal published by the Gesellschaft Urania and edited by Dr. Meyer.
Some remarkable photographs taken by Mr. Wilson in 1890 were commented on by Prof. W.H. Pickering in the "Sidereal Messenger." They showed the seasonal variations in the polar white blotches.
In 1889 there reached us from Chatto and Windus of London a most entertaining book by Hugh MacColl, entitled "Mr. Stranger's Sealed Packet." It was a work of fancy, ingeniously constructed upon scientific principles. It described a hypothetical machine, a flying machine, which was made up of a substance more than half of whose mass had been converted into repelling particles. Such a fabric would leave the earth, pass the limits of its attraction with an accelerating velocity and move through space. In such a way Mr. Stranger reached Mars. He found it inhabited by a people—the Marticoli—happy in a state of socialism, and with abundance of food manufactured from the elements, oxygen, hydrogen, carbon and nitrogen, with electric lights, phonetic speech, but without gunpowder or telescopes.
Its inhabitants had been derived from the earth by a most delightful scientific fabrication. A sun and its satellites in its course around some other center draws the earth and Mars so together that on some parts of the earth's surface the attraction of Mars would overcome that of the earth and gently suck up to itself inhabitants from the earth, who would not suffer death from loss of air, as the atmosphere of both bodies would be mingled.