PROBLEMS OF MODERN SCIENCE 



Still less is known concerning the formation 

 of nitrogen and phosphorus compounds in the 

 plant ; the problem is undoubtedly very complex, 

 and has been very little discussed except in a few 

 cases where the materials used by the chemist in 

 his laboratory syntheses can be assumed with some 

 degree of certainty to be present in the plant. 



From this very brief review of one aspect of 

 the recent work on carbon compounds it will be 

 seen that most important discoveries have been 

 already made in the chemistry of living plants. 

 In spite of the very great difficulties which must 

 be overcome, these preliminary advances, viewed 

 together with the constant progress of organic 

 chemistry in the past century, justify a confident 

 hope of the success of future investigation. 



S. SMILES 



1 10 



