-President Biz, ot the Calumet and Hecla miue, has notified the Governor that at the couclusion of the Centennial Exhibition that company will present to the School of Miues of the State University the magniiiceut working model of a stamp-mill now on exhibition on the Centennial grounds. This is a complete reproduction on a small scale of one ot the Calumet and Hecla milla. It was built by that company at a coüt of $15,000 expressly for the Centennial machinery department, where it was connected with an engine and set in motion. It has attrocted much attention from visitors and has been greatly admirad by experts as a splendid specimen of machinery. No giít to the University could have been more appropriate or timely. It will prove of practical value to the School of Miues and will be an important addition to the equipment of the University. The people oi the State have reasou to thank the Calumet and Hecla Company for their generous gift, which, it is hoped, may provoke tollowers tn other ilepartments of science and the arts. - Detroit Post. Prof. Douglas hasjustshown us a letter from Rhodes & Co., of Cleveland, in which they propose to dónate to the School of Mines a valuable collectlon of specimens of pig iron, ores, fluxes, and coals used in its manufacture, now on exhibition at the Centennial. Mr. J. McDonald, of the Lake Superior mining region, should also be credited with a valuable coliection of vein material, wall rock, etc., trom the Calumet and Hecla mines.