Nikola Tesla Books
112 HIGH FREQUENCY APPARATUS case. The kicking coil type of outfit lends itself admirably to the requirements of the practitioner, however, for work at the patient's bedside and such an outfit may readily be constructed by the amateur worker who is the fortunate possessor of a few tools and some ingenuity in their use. Portable Kicking Coil Outfit.-In Chapter VIII, a very good outfit of this type is described in detail. The specifications call for the various parts of the outfit mounted upon a common base of wood. For the purposes of the physician, the entire outfit may readily be assembled in a wooden cabinet with handle attached, or it may be built into a small leather suitcase. The latter method is, perhaps, to be preferred as the container is more durable. In building the outfit from the directions given in the chapter referred to, the worker had best employ a mica condenser in lieu of the glass sheets. The mica sheets come in a thickness of about in. and each sheet may safely be split in two as the mica has a higher dielectric value than the glass. The cost of the mica is, of course, much higher than that of the glass but only half as much of the mica is required. The exact number of plates required is dependent partially upon the speed of the interrupter and the worker may well experiment as directed in Chapter VIII to determine exactly the right amount of condenser to use before he proceeds to build the box that is to hold the plates. The discharger post of the oscillation transformer may prove so long that the apparatus will not go into a case of reasonable size. If this is the case, the post may be cut off an inch above the box in which the coil is mounted, and fitted with a plug and socket connection. The arrangement of the parts will suggest itself to the builder and no specific instructions will be given owing to the fact that the size of the cabinet or suitcase to be used will govern the precise
