I9I3] J' Arthur Harris 53 1 



For b, 



rmn = — 0.53 ±0.10, rme = + 0.19 ±0.14, ^ne = O.O/rtO.Iß 



For c, 



rmn = + 0.04 ±0.13, rme = + 0.21 ±0.13, ^ne = + O.O/ ± O. I4 



B, For correlations between the excretions of different indi- 

 viduals on the same day : 



For 7 A. M., 



ro&== — 0.00 ±0.14, roc = + 0.46 ±0.10, nc= + 0.00 ±0.14 



For 12 M., 



ro&= + 0.20 ±0.12, roc = + 0.31 ±0.12, r6c== + 0.08 ±0.13 



For 5 P. M., 



foö = 4- 0.15 ±0.13, roc = + 0.07 ±0.14, nc = + 0.03 ±0.14 



In each case three of the values are negative and six positive in 

 sign, They thus tend to confirm Higley's Suggestion concerning the 

 relationship between common external conditions and volume of 

 carbon-dioxide excreted. But the probable errors are high (because 

 of both the lowness of most of the coefficients and the smallness of 

 the number of observations) and the constants are very irregulär. 



For trustworthy conclusions larger series are necessary. When 

 these are available, the correlations here suggested may, I believe, 

 be of supplementary value. 



J. Arthur Harris 



The Carnegie Institution of Washington, 

 Station for Experimental Evolution, 



Cold Spring Harbor, Long Island, N. Y. 



