Morton, Edward Reginald, 1867- · New York : E.B. Treat & Co. · leaf 80
on as the THE COOLIDGE TUBE. 55 spiral is sufficiently healed the high tension current maybe turned on to the tube, and so long as the temperatureof the spiral is not altered the quality of the radiationremains constant. The hotter the spiral the softer andless penetrating are the rays from the… … B A Fig. 21. Shewing arrangements for the Coolidge Tube. The advantages of such a tube will be evident, and itis to be hoped the scheme will be so modified as tobecome adaptable to everyday use. At present there aresome practical difficulties; the necessity for a separateelectrical supply to heat…
