APPENDIX II 



TABLES OF STATISTICAL DATA 



THESE tables embody the results discussed in Chap- 

 ter IV., and they show the properties of samples of 

 cotton formed on successive days of the season. The 

 same " pure strain " of cotton was employed in both the 

 Dated Flowers Experiment of 1912 and the Daily Pick- 

 ing Experiment of 1913, so that any differences between 

 different samples are solely due to the action of the 

 environment on the plants, and not to any differences of 

 inherited constitution. 



The differences between various samples as numerically 

 expressed in these tables embody in addition certain un- 

 avoidable experimental errors, so that two samples might 

 be identical and yet not give exactly the same numerical 

 results. These errors have been reduced as far as was 

 practicable in the execution of the work, and have 

 been further obliterated by working out "five-day 

 means." t 



Tables I. and III. present the actual experimental figures 

 for each lint hair, seed, or sample, examined in the two 

 experiments. Tables II. and IV. summarize the average 

 results for each five days. Thus the figures given in these 



196 



