Show MORE ABOUT MARS Several Valuable Papers on Late Observations The Conclusions Beached Prqfessir Holden at ban Francisco and Professor Pickering la Peru NORTHFIELD Minn Oct 3The October Octo-ber number of Astronomy a scientific magazine maga-zine edited by Professor Payne of Carleton Carle-ton college contains several valuable papers on the recent observations of Mara The first is by Professor Holden who under date of Aug IS explains the work of the bigLick telescope in California giving his conclusions as follows I may briefly state my individual conclusions as derived from comparison of my own observations ob-servations of Mars at opposition of seventyfive and succeeding ones to be that changes in the surface features of Mars as we now know them are probably not capable of being completely explained by terrestral analogies What arc we to make of the lake called Fons Juvohtae for example which as a single object In 1877 which was not visible in 1879 and which has been both single and double during the present year Is it conceivable con-ceivable that an observer on Mars examining examin-ing the earth in any part of its recent history his-tory would have seen such amazing topographic topo-graphic changes as we this year observed not to speak of tbe changes from opposition to opposition opposi-tion i appears from careful examination and a long series of drawg i of Mars which we owe to Professo ptihiaparalli and others up to thepresent time will make I evident there are enormous difficulties collies in the way of completely explaining the recorded phenomena by terrestrial analogies unless we also intu > duce serious modifications Professor Pickering of Harvard college writes under date from Arequlpa Peru Aug 1 1S93 He says In seeking to explain the changes I would merely point out the fact tat cnanges occurred at a time when the snow was melting with great rapidity that a dark channel suddenly appeared July 12 which had not been seen at last previous observation of this region on June 13 that it shortly disappeared again and a few days after this event the northean sea largely increased in area temporarily or at least that its southern shores became much darker 1 think these changes cannot be explained by are n cloud effect We have already observed large whitish patches upon the planet which undergo certain I changes in shape and extended from night to night Wo are now studying tnem carefully care-fully although we find them rather difficult of observetion These changes we are inclined in-clined to refer to as clouds although the matter is not as simple as it might at first appear I these effects aro really due to clouds they are quite different in character from other changes noted |