Carbon Assimilation. 
93 
the future plant physiology will acquire the co-operation of photo¬ 
chemists, who already take an interest in the work of the plant 
physiologist. It is encouraging to find an appreciation of plant 
physiology by the photochemist Plotnikow (1910), whose words on 
this subject we may quote in conclusion. “ From this one realises 
how much material, work and patience is required for this problem. 
But let us hope that this will prove no obstacle for further investi¬ 
gations in this field. Labour loving scientists should not lose heart 
for penetrating further along the path so far prepared. 
A brilliant success must finally crown their labour.” 
