Untitled

Press, Volume LXXI, Issue 21411, 1 March 1935, Page 4

Diamonds still are the hardest substance known, but they are being crowded for the lead in this 'field by new materials created artificially. Tantalum carbid has been champion, until recently, among man-made hard materials, but, now, the successful production of an even harder one, boron carbid, has been announced by a worker of the research laboratories of the Norton Company, Worcester, Massachusetts. These two carbids, and others nearly as hard, compete with diamond-dust and impure diamonds, or "borts," as industrial grinding and cutting materials. The common element sodium, one of the two chemical components of ordinary table salt, can be made radioactive by proper treatment, and yields gamma rays more powerful than those of any other substance known, it was announced recently in the "Physical Review," by Professor Ernest O. Lawrence, of the University of California. Since it is the gamma radiation which produces the effect desired of radium in cancer treatment, the new source, if not too expensive to produce in quantity, may open up new fields of medical as well as physical research. CATARRH SUFFERERS. Anticatarrh, the new scientific treatment for nasal catarrh, will definitely cure this distressing affliction. Head noises permanently relieved. One month's supply 3s 6d. Posted 4s 6d. Taverner, Chemist, 183 High street, Christchurch. —2