Salomons David L. Experiments with Vacuum Tubes

London: Wittaker and Co, 1903. — 49 p. With 54 illustrations.Mr. Spottiswoode, who charmed me by his beautiful experiments with vacuum tubes. Prior to that time I took a great interest in the subject, partly from the beauty of the phenomena, and partly because they seemed to baffle all efforts to unravel them. From that day to this the subject has engrossed my attention, for I believed that a great deal could be done with these tubes, if only the right methods were devised.