W. A. Davis, A. J. Daish and G. C. Sawyer 279 



smaller scale than the increase which is found at this time of night 

 in the later stages of growth. No stress can, however, be laid upon 



Nrght 



6am 8 10 12 Noon 2 P.M. 4 6 8 10 12Nfght2AM 4 G 



Fig. 4. Mangold leaf, Series T, Aug. 26-27, 1913. 



this slight departure from a regular falling oft" in the sugar, as it might 

 well be occasioned by error of analysis or sampling. That this error 

 is, however, in general quite small may be inferred from the regular 



