A System of Physiologic Therapeutics: ElectrotherapySolomon Solis-Cohen P. Blakiston's, 1902 - Massage therapy |
Common terms and phrases
acid action alternating current ammeter ampère apparatus applied arrangement attached ball battery current become binding posts body carbon catskin cautery CELL SELECTOR charge chemical circuit condenser conductor connected construction copper current flows current strength cylinder Daniell cell deflection direct current direction discharge dynamo effects elec electrified electrode electromotive force electrotherapy employed faradaic fluid galvanic current galvanometer glass graphite handle heat high frequency increased induced current induction coil influence machine instrument insulated internal resistance interrupter lamp Leclanché cells Leyden jars light machine magnetic needle means measure metal method milliampères motive force negative obtained Ohm's law ohms patient placed plate platinum plug poles positive potential pressure primary coil principles produced purposes quantity of electricity regulated resistance coil rheostat rider secondary coil Showing shown in figure shunt sinusoidal spark static surface therapeutic tion tricity tube unknown resistance voltage voltaic voltmeter volts wire X-rays zinc
Popular passages
Page 63 - The volt, which has the value 10s in terms of the centimetre, the gramme, and the second of time, being the electrical pressure that if steadily applied to a conductor whose resistance is one ohm will produce a current of one ampere, and which is represented by '6974 (TTFT) of the electrical pressure at a temperature of 15° C.
Page ii - A SYSTEM OF PHYSIOLOGIC THERAPEUTICS. A Practical Exposition of the Methods, Other than Drug-Giving, Useful in the Prevention of Disease and in the Treatment of the Sick.
Page 77 - ... being connected through the bottom of the vessel with a pole of a battery, the upper and free end of each being covered by an inverted test-tube that has been filled with acidulated water prior to such inversion. (See Fig. 48.) When the current then flows, the gas — hydrogen or oxygen — formed at each platinum strip collects in the respective tubes, forcing out the water. In the case here assumed one tube fills with gas twice as quickly as the other, because water consists of two parts of...
Page 209 - The justification of the term "rays," applied to the phenomena, lies partly in the regular shadow pictures produced by the interposition of a more or less permeable body between the source and a photographic plate or fluorescent screen. I have observed and photographed many such shadow pictures.
Page 21 - No. 3, and they will be attracted as was the single ball, cuul on removing the rod after the balls have touched it, they will come to rest ; not, however, resuming their position of contact, but standing off at a distance from each other. Bring No. i and No. 2 near each other. Touch No. i with the rubbed glass rod and No. 2 with the rubbed sealing-wax. The two balls will now attract each other, but if they are allowed to touch, they will fall apart again and lose all sign of electrification. These...
Page 127 - The volume of the spark is modified by the me of the brass ball on the end of the electrode. A large ball will produce a heavier spark than a small one. The therapeutical effects of this method of application will be discussed later. I would call attention, however, to the violent muscular contractions which occur with each spark. This method is somewhat painful. The withdrawal of a spark leaves a "weal...
Page 127 - indirect" spark; because the electricity takes an indirect course (through the earth) to form a circuit. It leaps from the patient and escapes to the earth down the gas-pipe or whatever grounding the electrode may chance to have. The length of the " indirect " spark is directly proportionate to the generating power of the machine — supposing, of course, that all other factors in the application are...
Page 20 - f," and fixed in wooden or metal bases. We will call them I, 2, 3. From I and 2 suspend single small balls of elder pith by fine silk threads, so that they hang perfectly free, and from 3 suspend in the same way two balls so that they touch each other. In addition to this take a rod of glass a few inches long, a stick of sealing-wax, and a piece of silk. If we rub the glass or sealing-wax briskly with the silk and hold it close to the ball of No. I, the ball will be attracted to the rod ; but so...
Page 212 - ... the spark rods of the adjuster. Messrs. Queen & Co. make a tube (Fig. 153) in which the vacuum is adjustable and is kept constant at the desired point by means of an automatic device. A reference to the illustration will make the operation of the tube clear. A small bulb containing a chemical that gives off vapor when heated, and reabsorbs it when it cools, is directly connected with the main tube, and is surrounded by an auxiliary tube exhausted to a low Crookes vacuum, the kathode being so...
Page 209 - ... cm., according to the degree of exhaustion of the gas in discharge tube. To judge from the nature of the discharge, I have worked at about the same pressure, but occasionally at greater or smaller pressures. I find, using a Weber's photometer, that the intensity of the fluorescent light varies nearly as the inverse square of the distance between screen and discharge tube. This result is obtained from three very consistent sets of observations at distances of 100 and 200 mm.