ANIMALS, THEIR SIZES, ETC. 69 



clear that a mouse would grow to be as large as an 

 elephant if the cells in his body continued to grow 

 and multiply for a sufficient period of time. Why 

 do the cells cease to multiply when the mouse has at- 

 tained a certain size? Why do they stop work in the 

 elephant's body when he gets his normal growth? Do 

 the cells in the mouse and those in the elephant know 

 when their wcrk is dene? How do they know it? 



The materialist denies the existence of a First 

 Cause and maintains that every animal and plant is 

 the result of "a natural continuous and necessary 

 evolution.' (Haeckel, Evolution of Man, p. 26.) 

 Huxley says, in effect, that "secondary cause*' pro- 

 duce all the phenomena of the phy ical universe; and 

 that man and the rest of the living world "are all 

 cc-crdinated terms in nature's great progression/ 

 (Man's Place in Nature, pp. 150-151.) 



But it appears that the materialist maintains 

 that the law of heredity is fixed and unchangeable, at 

 all events it is proof against secondary causes. For 

 example, no sort of treatment, nor any kind nor 

 quantity of food will make a mouse grow to the size 

 cf an elephant nor gny larger than his ancestors were. 

 Fcod and environment are "secondary causes;' but 

 they have no power to change the form nor the size 

 cf the animal body. 



Since all normal adult individuals of each species 

 cf animals, all over the earth, anl in every age, have 

 substantially the same form and size; and since each 

 individual is built up, anew, of new cells (or atoms) 

 by new forces and motions, we are compelled to as- 

 sume that the saire psychic force or agency determines 



