328 



BOTANICAL GAZETTE 



[XOVEMBER 



of the chlorophyll; but for comparison it is not out of place to 

 calculate the N by the factor 6. 29 to convert it into soluble protein 



10 11 12 13 



IS 16 



Fig. 7. — Different carbohydrates in stems 



for temporary convenience in interpreting the results. The curves 

 of the soluble protein in figs. 3-5 are self-explanatory, showing the 

 variation throughout the season. 



