172 



THE STRUCTl'KK OK TIIK XUCLEUS, 



TABLE.— NEEDLE CHARGED BY MOMENIARV COM lAC I" WMH CAPSULE; 

 CAPSULE PERM. CHARGED BY STORAGE BATTERY ; QUADRANTS WITH 

 I CLARK CELL. '\l POLE EARTHED. SCALE DISTANCE, ABOUT 4 M. 



