THE WIRELESS SYSTEM 189 



exactly balanced. This gave a horizontal record ; an 

 acceleration of growth above the normal is represented in the 

 records by a down-curve, and a retardation by an iip-curve. 

 Experiment 114. Effect of feeble stimulation. — I first 

 studied the effect of feeble stimulation secured by decreasing 

 the energy of the sparks of the radiator. The response was 



i 



< ' 



Wlmrw^ 





;■« BQ) » m- 



EARTH 



EARTH 



Fig. 1 10. Diagrammatic representation of method employed for 

 obtaining response to Wireless Stimulation. Transmitting 

 apparatus seen to the right. Receiving aerial connected to 

 upper part of plant, the lower part of the plant or the 

 flower-pot being connected with the earth. 



an acceleration of rate of growth as seen in fig. 11 1, a. The 

 analogy of this with the accelerating effect of subminimal 

 intensity of light (p. 83) is very remarkable. 



Experiment 115. Effect of strong stimulation.— 1\\g 

 maximum energy radiated by my transmitter, as stated 

 before, was only moderate. In spite of this, its effect was 

 very striking on plants in good tonic condition. The 

 balance was quickly upset, indicating retardation of the 

 rate of growth. The latent period, i.e. the interval between 



