Consciousness in Plants. 325 
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SEEDLING OF WINTER GRAPE. 
Earth Cut Away to Show Directions Taken by Tip of Kadicle in Avoiding a Stone. 
harder and softer adjoining surfaces. Consequently, it will 
tend to bend from the harder soil, and will thus take the 
directions of the least resistance. So it will act if it meet 
with a stone or the root of another plant in the soil, as must 
incessantly occur. Ifthe tip were not sensitive, and did not 
excite the upper part of the radicle to bend away, whenever 
obstacles were encountered at right angles to its growing 
direction, it would undoubtedly be liable to be doubled up 
into a contorted mass. But with radicles growing down 
inclined plates of glass, as shown by experiment, it has been 
