LONGITUDINAL RESPONSE OF RADIAL ORGANS 73 



Fk 



The Kunchangraph 



P, The plant enclosed in semi-cylindrical wire heating cage, h, seen open. The 

 plant is attached to the Optic Lever. Light proceeding from focussing tube, L, 

 after reflection from optical mirror, M, falls on the recording drum, D. Stimu- 

 lation is periodically effected on closure of electrical circuit, containing storage- 

 battery, s, by the rotating rod, K. Air from bag not shown is passed through 

 water-vessel to right, and circulated through plant chamber. The vessel to left 

 is the aspirator. The middle vessel contains ether or other chemical sub- 

 stance, which is made to displace air in plant chamber, by manipulation of 

 stop-cock, c;, the clock-governor. 



