EFFECT OF WIRELESS WAVES IQI 



induced fatigue and temporary insensitiveness of the organ. 

 The effect of moderate fatigue is a prolongation of the latent 

 period. Thus, in a particular experiment the plant failed 

 to give any response to a short signal. But after an interval 

 of 5 minutes a marked response occurred to the wireless 

 stimulation that had been previously received. The latent 

 period was prolonged, on account of fatigue, from a few 

 seconds to as many minutes. In less sensitive specimens 

 the wireless stimulation has to be continued for several 

 minutes in order to evoke response. 



Effect of Wireless Waves from a Portable 



Generator 



A short-wave four-valve set adjusted to send out wire- 

 less oscillations of definite wave-length was used. Just 



Fig. 112. Acceleration of growth by wireless stimula- 

 tion in a subtonic specimen (Wheat). 

 Enhancement of growth in this and following records 

 represented by up-curve, retardation by down-curve. 

 Successive dots 20 seconds apart. 

 Record taken under condition of approximate balance. 



before application to the plant the transmitter was tested by 

 the receiver to make sure that wireless waves of a particular 



