A Colorado Volcano

Astoiinding report of all kinds como froin Colorado. One of the latest is furnished by a oorrespondent of the Central City Register, who claims to havo learned of a real active olcano. lio writes : A startling piece of newshas just come toliand; 110 loss than a minute deseription, by more than one crodible witness, of a volcano bursting forth a few milos north of us. We won: inolined at flrst to doubt the statement, but it comes so straight, and the story is so well told, that it seems there must bc somethinr in it. The t'ucts are that last Tbursday Mr. Burke, a reliable man of this place, was out prospectirjg near tho hoad of the North Boulder. (Your correspondent having been over ihat country is prepared to testiiy that in ages past volcauin eruptioiis must have been common.) Out prospector saw smoke at a distance, whiohbeat flrst attributed toa tire in the woods, but second thought convinced him that that was not possible, as its locality was far ftbove timber line. So, with tlio usual zoal of a prospector for something new, ho clambered tip and down over the several ridges of the maio range, until arriving at tho place, he found himself on the edge of a veritable cráter. The place had evidently once been the scène of great and long-contintinued volcanio action, for there was plainly to be traced the rim of a prehistorie erator about one mile in diameter. Within tho ancient bowl and near one cdge tho young volcano had commenced operations. It did not emit violently wbile hu was there, but contented itself with an oceasional spasm, the rest of the time smoking as placidly asan oíd tobacconist. But the best proof of his story aro bits of lava, evidently of recent origin, and several lnmps of scoria. These are now being hnnded about among the boys, and are regarded with as muoh curiosity and interest as is ever manifestad in the last rich "strike." A l;rge party will start from hore in a few days, determined to authenticate or disprove the matter. Soveral men have alroady been there and all returned with ava trophios. Dr. Kedzie, of the Michigan Agrieultural College, gives the following account of the injurious action of salt. on trees : " On the college grounds there formerly grew a fine, vigorous specimen of comnion sassafras, apparently in perfect health. A quantity of strong brine was inadvortently thrown beneitth this tree, forming a stagnant pool in its immediate vicinity. In a very short time the tree began to manifest signs of decreasing vitality. The salt was absorbed unchanged in such iinmenssquantities, that entering the circulation, it efflorescod upon the surfaoe of the lea vos as a white orystalline deposit, and the treesoon after died." Professor AViso saya: " while the complete crossing of the sea by balloon is very desirable in giving edal to the project, it seems to me that it is not the raost important feature of the schuine, The grand principie involved is, does the air roll round the earth froni west to east at tbe avorage rate of' 40 to 50 miles an an hour f aster than the velocity of the earth p"