OZONE. 229 



cerned in the simultaneous production of electricity and 

 ozone. The French Academy have ascertained that 

 much ozone is developed under the action of blowing 

 machines. This may in part account for the healthful 

 action of winds. 



As ozone, to be of advantage to the physician, must be 

 developed at his will, I will state that it is easily pro- 

 duced by the electric current as follows : A sufficient bat- 

 tery is required to give an inch spark with a coil. A 

 glass tube about two and a half feet long having a half 

 inch bore at one end and near the other contracted to one- 

 eighth of an inch. Pass a wire from the coil into the 

 large end of this tube and out at the side near the 

 point of contraction. Melt sealing wax around the wire 

 so as to prevent the air from passing in or out at the side 

 of the tube, but leave the ends open. Coil the other wire 

 from the electric coil around the outside of the tube fol- 

 lowing the tube down to the point of exit where connect 

 the wires, and pass the current of electricity. By passing 

 the air through this tube slowly the oxygen will be 

 changed to ozone. The conducting wires from such a coil 

 will always give more or less ozone which, in a common 

 sized room, can easily be detected by the smell. It is 

 thought that one-millionth part of ozone in the atmos- 

 phere can be thus detected. 



It has a pungent smell which has been compared to 

 the smell of sulj^hur. By rubbing a rubber comb ozone 

 and electricity will both be evolved and you can thus 

 get the odor distinctly. It can frequently be observed 

 in a building after it has lieen struck by lightning. It 

 was observable four weeks afterwards in a house in Kirby 

 struck by lightning two years ago. It is sometimes faintly 

 perceptible during or after thunder storms as I have my- 

 self twice observed. If an electric coil is not at hand 



