24 



Scientific Proceedings, Royal Dublin Society. 



In dealing with Sphagnum cymbifolium, it has been necessary to bring 

 up jars of alcohol to the bog for collection, as laboratory cultivation is out of 

 the question. Once again, the results are expressed as ratios. 



The above analysis renders it improbable that the hexoses are antecedent 

 to the formation of sucrose, since here, also, that concentration of hexoses, 

 necessary to bring about the synthesis of sucrose in the presence of 

 invertase, is lacking. The next experiment was devised with the object of 

 ascertaining, if possible, which was the first sugar to be formed after the 

 application of light. 



On August 22nd, four jars of moss were collected in alcohol from the 

 mountains at intervals of one and a-half hours. The sun rose at 5.11 A.M., so 

 the first sample was taken at 4.45 a.m Only the green tops of the plants 

 were employed, and each sample was taken from the same locality. The 

 result of the analysis, expressed as ratios, is shown on the accompanying 

 table and graph. 



Sphagnum cymbifolium. 



