OCR Text |
Show More Ahoat Kxllnm, Cranium pitchblende ore, from which nllum la derived, occurs mainly lu mica slute. Tho places where It Is fMnd are the deep workings of the former levels of the silver mines of Joschlmsthal. Professor Becke of Vienna, Vi-enna, recently E 1(ie experiments with omnium pitchblende ores at the Imperial Im-perial Museum of Natural History, wWch have been In possession of the nuseum since lHotl. The experiments dMUonstrntod tbut, lu spite of their s, Oiey have lost absolutely nothing of their Intensity of radlo-actlvlty, and ot th energy of their electric properties. prop-erties. TMey do not differ In any iy from the ores uor taken at Jeschiuisthni. |