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AS MISS E. C. FOWLER (BACKGROUND) ASSEMBLES SPECIAL TUBE STRUCTURES, E. W. HEROLD AND MISS J. V. TRUSKA DISCUSS A TUBE CONSTRUC- TION PROBLEM. USING A NEWLY DEVELOPED DEVICE KNOWN AS A MECHANICAL IMPEDANCE BRIDGE, PR. H. F. OLSON AND A. M. WIGGINS TEST AN ELECTRO-MAGNETIC MECHANISM. of medicine, biology and industrial research, so will electronics open many doors in the future. We shall measure, control and process better through the use of electronic meth- ods in the home, the laboratory and the factory. The future will be studded with a myriad of electronic jewels. Radio tubes to generate power at radio frequencies have been used mainly at sources for radiating sig- nals through space. Power for man- ufacturing processes has been re- served for the low alternating currents. Research has shown, and industry now realizes, that alter- nating current at radio frequencies has unique advantages for many services and performs in many ways not attainable by older meth- ods. Thus, generators of radio fre- quency will take their places in the factory, in the field and even in the home, to heat and to effect various reactions and changes. Such uses will shortly place much more radio- type power in industry than in all radio communication and broad- casting. We entered the war with broad- casting at the ultra-high frequency channels and television taking their first steps along the road to public service. These, television particu- larly, are needed in the post-war ])eriod to spur on and to sustain progress and employment. The knowledge gained through years of television research was most help- ful in other fields of development for instruments of war: therefore, it is to be expected that war-work will indirectly add to television knowledge and techni(|ues. Because of this, we will be able more readily to add sight to sound, as a radio service. Thus, while we are driving for- ward with our war-work, we do have our thoughts on the day ahead, when the war clouds will roll away and we can again undertake the work of our desires. We are con- scious of the potentialities of the products and services to come from the researches, now inactive, which will be prime objectives "tomor- row." We dream of the contribu- tions that will be made in the fields of science, culture and just ordinary living, convinced that radio, elec- tronics and acoustics will have an important part. These, and others, are the things that will take form in our research workshop after the war. Men of science, doing research, like to think of the results of their work as benefits, as progress, as SCIENTISTS GO TO SCHOOL, TOO. DR. W. D. HERSHBERGER REVIEWS MAXWELL'S EQUATIONS FOR ENGINEERS WORKING WITH WAVE GUIDES AND OTHER TECHNIQUES. CIRCUITS RESEMBLING THOSE USED IN TELEVISION EQUIP- MENT BEING TESTED BY R. D. KELL AND T. L. GOTTIER. [5 RADIO \GE