SUPPLEMENT. 



NOTE A. 



Page. 



HENRY'S FIRST EXPERIMENTS 375 



NOTE B. 



" INTENSITY " AND ' ' QUANTITY " CURRENTS 376 



NOTE C. 



THE ELECTRO-MAGNETIC TELEGRAPH 380 



NOTE D. 

 HENRY'S MULTIPLE-COIL MAGNET 390 



NOTE E. 

 ABSTRACT OF PAPER ON SELF-INDUCTION 394 



NOTE F. 

 OSCILLATION OF ELECTRICAL DISCHARGE , 396 



NOTE G. 

 WHEATSTONE'S CHRONOSCOPE 398 



NOTE H. 

 HENRY'S "PROGRAMME OF ORGANIZATION" 399 



NOTE I. 

 ELECTION OF THE FIRST "SECRETARY" 406 



NOTE J. 

 HENRY'S PURPOSE OF ADMINISTRATION 409 



NOTE K. 

 STRUGGLE WITH THE LIBRARY SCHEME 410 



NOTE L. 

 DISTRIBUTION OF MUSEUM MATERIAL 418 



NOTE M. 

 OVERFLOWING CONDITION OF THE MUSEUM 419 



NOTE N. 



INVESTIGATION OF ILLUMINANTS 421 



(375) 



