Jor detecting Metallic Masses in the Human Body. 4% 
The coils were then replaced in their case and the completed 
instrument tested. The lower wooden block B (fig. 18) was 
adjusted by hand as nearly as possible to the position of silence, 
and then the thumb-screws ©, D, E, F were tightened. 
he balance now obtained was not quite perfect, but by 
striking the lower block B, a few smart blows with a wooden 
ae we were able to reduce the arrangement to complete 
silence, 
portion G of the wooden case (fig. 18) under the weight of the, 
Was in a condition to be used, should any necessity arise for an 
immediate experiment. At the same time I informed him that 
Up 
ee 
the bullet was al ways supposed to be. 
bad terminals are not connected, and the sound produced is the fundamental of 
the rheotome employed to interrupt the primary circuit. : 
4. If the ibe os is defective the balance is disturbed, although the pines 
vig not connected, and a peculiar spluttering effect is noticed like that produ 
J 4 series of sparks. ; ays 
propose se apely this method practically as a means of testing the condition 
of the helices used in the construction of Induction Coils and those employed in 
the manufacture of telephones. 
