LIVING THINGS NOT MACHINES. 71 



modify them still further. Those who have 

 watched for ten minutes, under a high magni- 

 fying power, the varied movements of living 

 matter, and have thought a little over the ques- 

 tion of the nutrition of that living matter, will 

 not easily be brought to believe that such 

 phenomena are due to physical and chemical 

 changes only. The number of such observers 

 increases daily. 



HARRISON and SONS, Printers in Ordinary to Her Majesty, St. Martin's Lane. 



