Show ether drift experiment repeated with success washington the ether drift experiment peri ment whose failure more than 40 years ago started einstein on the investigations that led to the relativity theory has at last been repeated in modi modified fled form with successful results were reported here before the meeting of tho national academy ot of sciences b by y dr herbert E ives of the bell telephone laboratories secret of dr ives success was his use of streams of positively charged particles or ions known as canal rays raya instead of the beams of light originally tried in the classic michel son morley experiment in 1887 tills this experiment undertook to find out to what extent light would be deflected from its straight path through the ether when it was made to take a course at right angles to the direction of the earths motion through space light treated in this way might be considered scientifically as a lock and the expectation was that a clock in motion should run slower than one at rest so slight Is the slowing down that no speeds available to experimenters when the theory was announced were adequate for a crucial test but by using as a clock the light giving oscillation of a hydrogen ion which can bo be shot down a vacuum tube at a thousand miles a second it is possible to measure a definite nite change in the color of the light that of course means a change in the r rato ate of vibration of the atom |