Oscillographic Study of rnduction Coll 



179 



wound around the outside of the secondary and the ratio between the 

 secondary and tertiary was determined with a standard spark gap. The 

 ratio was 440:1. Figure 1 shows an oscillograph of the primary and 

 tertiary voltage waves and it is seen that the two forms are identical 

 as would be expected, when it is remembered that the winding in the 

 induction coil consists of a primiuy coil >vovnd on the magnetic core 



FJM. "'. 'i'liL' iii(Ku-t.n)n cciil was luaikd with a hiyh ficduciuy (lischaijio. The 

 peculiar chai-aclcr of tlic U'ltiaiy v<ilta'-;e v.a\c is nnteworthy. Note the considerable 

 part of the \va\e l)elii\v tlie -/ero lino imlicatin.^- reversal ol' vnlta.^c. 



Fis. 4. Same as ligtive 3. Note the alternating character ol' the secondaiy currer.t 

 anil of the tertiary \ oltai^o. These oscillo.n-ratihs indicate the marled deviation from 

 unidii'cctional cuiuent usually associated with the induction coil. 



around which is the secondary and finally the tertiary is wound out- 

 side of that. 



The other figures, 2, 3, and i, are self-explanatory. The voltage 

 and current waves are far from being even uni-directional. Attention 

 is called to the peculiarities of the tertiary voltage wave. From the 

 oscillographs it is not to be wondered that the chemical effects, which 

 are so sensitive to small voltage charges, are so inconsistent. 



