54 GENERAL PROPERTIES OF LIVING TISSUES 



a clear idea of the phenomena of induction must 

 now be gained. 



The Inductorium l The primary coil of the in- 

 ductorium (Fig. 14), wound with double silk-covered 

 wire of 0.82 mm. diameter, having a resistance of 0.5 



Fig. 14. The inductorium ; one-third the actual size. (The set screw 

 holding the trunnion block tube against the side rod is not shown.) 



ohm, is supported in a head-piece bearing three bind- 

 ing posts and an automatic interrupter. The core 

 consists of about ninety pieces of shellacked soft 

 iron wire. This core actuates the automatic inter- 

 rupter. The interrupter spring ends below in a collar 

 with a set screw. By loosening the screw, the inter- 

 rupter with its armature may be moved nearer to or 



1 American Journal of Physiology, 1903, p. xxxv. 



