Presidential address delivered November I, 1900 / by Dr. John Macintyre.

  • Macintyre, John.
Date:
[1900]
Catalogue details

Licence: In copyright

Credit: Presidential address delivered November I, 1900 / by Dr. John Macintyre. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    fluence machine. The tendency of late in coils has been to use a larger size than was at first suggested. A glance at the literature on the subject will also show that builders of coils have been impressed with the necessity of reconsidering the principles and methods of construction. With the advent of new interrupters and different conditions required in the Crooke's tube, many questions, such as high voltage and low current verstis low voltage and high current, have arisen. It is there- fore with a sense of satisfaction that we anticipate during the present session a demonstration of what we trust and expect may be of some service in solving these problems, namely, a closed circuit-coil, which promises exceedingly well. And in this connection we have to remember that at the address given by our first and distinguished President, Professor Sylvanus Thomson, a new induction coil for oscillatory discharges was men- tioned as the outcome of experiments by that great genius, Nicola Tesla, one of our honorary members. Since then many of us had hoped to hear more of this, and it is therefore with great pleasure I am able to say that in a communication which I received from him last week, he states that much material has been accumu- lated since his last contribution to this branch of scientific literature. Although delayed, as his time is occupied with other matters, he has been able to bring it into a finished form, and has made satisfactory advances in con- struction which he hopes will enable him very soon to be in a position to furnish apparatus enabling scientific men to more successfully investigate the interesting field which Eoentgen's great discovery has opened up. We shall look forward with profound interest in this direc- tion, and hope ere long to witness a demonstration of his recent successes. The true position and function of the influence machines in X ray work have not yet been