CAUSE OF EVOLUTION 385 



come adapted to the particular work he has to do and this 

 we find is also the case with the cells as well as man. 

 This being the situation, the cells must and do possess 

 the same intelligence. That they all possess the same 

 general knowledge and skill is evidenced by the fact that 

 they can do such work as may be necessary in any par- 

 ticular situation, as for instance in the case of repairing 

 broken limbs or cut tissues. As I said before, this work 

 required in any particular place just as much intelligence 

 as building the part anew. Any work in life requires in- 

 telligence ; the blacksmith, clerk, butcher, lawyer, all 

 must use intelligence in their work, and so it is with the 

 cells of our body. The intelligence may differ in degree 

 in the same manner that there are good and poor lawyers 

 and blacksmiths, but to be a lawyer or blacksmith at all 

 will require intelligence. 



Can the cells of muscle and motion perform the work 

 of sensation or direction? Can one cell do the work of the 

 other? We find that they can, but not as well. Take for 

 instance in the case of the polyp and polyzoan which 

 in every way are just alike in appearance, but one has cells 

 which we call the nervous system, for the special purpose 

 of keeping watch and giving notice of the approach of 

 enemies, while the other has not. The polyp when 

 touched will attempt to escape but, as it has the work of 

 notifying all the other cells to contract, its rapidity of 

 contraction is interfered with. The cells of the polyp, 

 although they can do the work of the nerve cells, cannot 

 do it with the skill and rapidity that the nerves do it, who 

 specialize in that work and have no other work to do. 

 We find this to be the case with animals and men in ex- 

 actly the same degree. In reference 'to this Spencer 

 states : "A polyp and a polyzoan, two similar in outward 

 appearances, but very unlike in their internal structure, 



