INTELLIGENCE OF THE CELL 221 



leathery skin of the others, like the cacti, hardly transpires 

 at all." 



To keep the human body in an even temperature and to 

 keep the plant warm enough to melt the snow around it, 

 is a continuous job, requiring great skill. The cells know 

 how to create heat and in the same way the southern 

 plant knows how to create cold. They obtain the- results 

 but in different ways. 



In the previous article from the school physiology, we 

 noticed that the cells in the brain although they were 

 connected together in a mass, still retained their individ- 

 ual separate existence, so each one must have a mind of 

 his own. Still, all working together, they form the mind 

 of the individual in the same way as all the combined 

 will of a nation or body of people becomes its will ; as 

 for instance we speak of the will of the Legislature, or 

 the sentiment or mind of the council, public, or the Ger- 

 man people. There is the separate mind of the individual 

 cell and the combined mind of the body or brain. The 

 human mind or brain is generally considered superior to 

 all others, by reason of its size. Mr. Haeckel has the 

 following to say about the brain : 



"With the most improved means of modern histology, 

 the most perfect microscopes and coloring methods, we 

 are only just beginning to penetrate into the marvelous 

 structure of the phronetal cells and their complicated 

 grouping. Yet we have advanced far enough to regard 

 it as the most perfect piece of cell-machinery and the 

 highest product of organic evolution. Millions of highly 

 differentiated phronetal cells form the several stations of 

 this telegraph system, and thousands of millions of the 

 finest nerve-fibrils represent the wires which connect the 

 stations with one another and with the sense-centres on 

 the one hand, and with the motor centres on the other. 



