418 PROF. J. C. BOSE ON THE 
I give a record (fig. 10) thus obtained, which will be found 
to bear out fully the considerations which have been put forward 
to explain the double electric response corresponding to a single 
] / 
} 
4 
| ! 
Wwe eel 
~—--~_ 
TT eee el 
=-—— 
~ 
E 
- 
meee eee 
~ 
= ee ——™ 
—— oe eee ee 
r 
i 
| 
i 
| 
J 
| 
| 
_l. t 1 1 [a 
0123 45 67 8 
Simultaneous mechanical (M) and electrical (E) records. The curves in 
continuous line represent the descending movement of the leaflet and the 
corresponding electrical pulsation. The curves in dotted line similar y 
represent the ascending movement of the leaflet and the corresponding 
electrical pulsation. 
mechanical response. It will be seen that after a period of 
quiescence, as the leaflet began to move downwards, it gave mise 
to the corresponding first or principal electric response. The 
movement downward ended in about a minute, and the princip 
