. Archives of physical medicine and rehabilitation . rays passes. The standard cell when connectedwith the galvanometer will give a react-ing on the scale corresponding to oneelectrostatic unit of radiation or adefinite percentage of such a unit. Forinstance, in one of my outfits the stand-ard cell gives a reading of one full the other the outfit is more sensitiveand the cell gives a reading of of a unit. One electrostatic unit of radiation in-dicates the amount of radiation whichwill ionize each cubic centimeter of airin the beam of rays so that it will per-mit the passage of
. Archives of physical medicine and rehabilitation . rays passes. The standard cell when connectedwith the galvanometer will give a react-ing on the scale corresponding to oneelectrostatic unit of radiation or adefinite percentage of such a unit. Forinstance, in one of my outfits the stand-ard cell gives a reading of one full the other the outfit is more sensitiveand the cell gives a reading of of a unit. One electrostatic unit of radiation in-dicates the amount of radiation whichwill ionize each cubic centimeter of airin the beam of rays so that it will per-mit the passage of one electrostatic unit 225 DEKP THERAPY MEASUREMEXTS—PFAHLER of current. An electrostatic unit is de-fined as that quantity of electricitywhich raises a sphere of a radius of 1cm. to the unit of potential, that is, 300volts. According to Kohlrausch, it is expressed with a small e. One elec-trostatic unit of current equals one elec-trostatic unit of charge per second. Thenumber of electrostatic units of currentmultiplied by the number of seconds A. IfiK- 1—.Showing Ihe ionizalion ohaiiibei- .V . ■ i 1. , which are into the socl< in an,v room containing: :t itKichiiu tt» Ite 2—Showing tlie galvanometer without tiie roflectinp: mirrors ;ind the
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