PLATE XXIV, 
JOHNSON AND YORK. 











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Crart SHOWING THE VARIATION IN RANGE oF TIDES THROUGHOUT THE GRowING SEason, CoLp SPRING HARBOR, 
FROM May 1 to OcrosBer 31, 1911. 
Tables, for Cold Spring Harbor. In the cases of May and June the varying degrees of coincidence of low tide with the 
hours of darkness and daylight are indicated by black bands for night and light ones for daytime. From this can be 
of time during daylight that plants at any level are above water. 
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MLW 
MLW 
