192 



CHAP. XVII. WIRELESS STIMULATION 



frequency were being produced, the reading dial having 

 been cahbrated beforehand. Employing the portable 

 generator for electric waves, I succeeded in repeating most 

 of the results given above. The energy of radiation emitted 

 was not very great ; the length of the wave was about a metre. 



I give the following 

 typical results obtained 

 with the portable genera- 

 tor. 



Experiment ii6. Ac- 

 celeration of growth in a 

 suhtonic specimen. — The 

 specimen of Wheat- 

 seedling exhibited the 

 feeble rate of growth of 

 o • 37 [jl per second. Wire- 

 less stimulation induced 

 an acceleration of the rate 

 of growth. The stimulus 

 was relatively feeble, and 

 the enhancement of re- 

 sponse, as exhibited by the 

 upsetting of the balance 



Fig. 113. Retardation of rate of growth -^^ ^^ upward direction, 

 under strong wireless stimulation ^ 



(Crinum). occurred shortly after 



Record taken under condition of balance, the application of stimu- 

 lus (fig. 112). 



Experiment 117. Effect of moderately strong stimulation 

 on actively growing organ. — A peduncle of Crinum Lily 

 exhibited a moderately active rate of growth (0-40 [± per 

 second). It was subjected to wireless stimulation, which 

 induced a retardation of the rate of growth, shown by 

 the down-curve (fig. 113). The upsetting of the balance, 

 showing diminished rate of growth, occurred about 3 minutes 

 after the incidence of stimulus. 



Experiment 118. Record of growth-variation without 

 balance. — An interesting and confirmatory experiment was 



