FORCE AND MOTION 37 



tion from one point or position in space to another; 

 continuous variation of position.' (Cent. Die. 5, p. 

 3872.) 



Every human being begins life as a fertilized 

 ovum, which is about as large as one-sixth of a pin's 

 head. At birth, an infant weighs from five to nine 

 pounds, the average weight being six and one-half 

 pounds. (New International Encyc. 7, p. 775.) It is 

 then millions of times larger than a fertilized ovum. 

 In other words : millions of atoms have been selected, 

 assembled, chemically combined and mechanically ar- 

 ranged and grouped in such a manner as to form the 

 body of a living infant, which is a complete miniature 

 model of the body of a man or woman. 



It is obvious that the materials of which the 

 embryo body is built up, except the fertilized ovum, 

 are derived from the food eaten by the mother; that 

 her heart and arteries generate the forces and produce 

 the motions which carry the materials to the building 

 site of the embryo, just as the builder assembles the 

 bricks, stones, sand, lime, lumber, nails and other 

 materials to build a house. 



The embryo body is a compound physical struc- 

 ture built of cells, as a house is built of bricks. The 

 atoms and cells, of which it is composed, are subject 

 to all the laws of force and motion, to the same ex- 

 tent, and in the same manner that bricks are. Nor 

 have they any more intellect, memory nor will-power 

 than a brick has. 



Perhaps the first thing that an infant does, after 

 birth, is the breathe. In order to do this, air must 

 be forced into, and out of its lungs. To enable the 



