SUMMARY OF THE FOUR YEARS ' WORK. 



59 



Florida ami Maine stations three years' work has been completed. 

 The Ne\\ Jersey experiment is scarcely comparable with the others, 

 as it covers only one year in which the conditions were abnormal and 

 tlit 4 crop almost a failure. The New Jersey station is therefore 

 omitted in platting the summary for the four years. 



In figure 5 a very interest ing point is brought out, i. e., the effect of 

 temperature on suirar formation, the curve showing that the percent- 

 i varies usually with the temperature. The altitude at 

 the South Carolina station and the fact that only the Crosby variety, 

 having a higher sugar content than the Stowell, was planted in 

 Maine, are factors that must be considered, and may partly explain 



PR CEA/T SUGAR //V CO#N 

 AVERAGE LEM67H Of OAV 



Flo. 5. Four years' summary: Percentage of sugar in the com, mean temperature, average length of day, 

 and altitude at the different stations. 



the variations at these points. In the environment studies with the 

 heet. ho\\ever. it was found that the sugar content varied inversely 

 with t he temperature. The curve showing the average length of day 

 al>o folln\\s that for the percentage of sugars very closely. The 

 curve representing altitude appears in the case of the South Carolina 

 station to be an index to the sugar content and undoubtedly has an 

 important hearing on the high results obtained at this point. There 

 is not, however, sufficient difference in the altitude at the other sta- 

 tions to form the basis of a definite general conclusion in regard to 

 this point, and it can only be considered in a general way, being, of 

 course, included in the effect on temperature. As has been stated, 

 the rainfall, and especially its distribution, appear to have more 

 influence on the formation of sugars than any other factor, and the 



