20 THE INVISIBLE WOELD 



Like plants and animals in the Visible World, 

 microbes occupy the whole earth. Some are 

 adapted to the intense heat of the equator, others 

 to the milder heat of the tropics, and others to the 

 intense cold of the polar regions. 



Another thing : It was stated in the last chapter 

 that the larger the individuals, the fewer the num- 

 bers; and the smaller the individuals, the greater 

 the numbers. It may also be noted that the higher 

 the order the less the numbers; and the lower the 

 order the greater the numbers. The individuals of 

 the human race must be multiplied many times to 

 equal the number of animals below them. All the 

 animals of the Animal Kingdom must be multi- 

 plied millions of times to equal the number of liv- 

 ing things in the Vegetable Kingdom. And in the 

 Microbian Kingdom the living beings outnumber 

 by millions upon millions of times all the liv- 

 ing beings above them, both in the Animal and 

 Vegetable Kingdoms. As we go up in the great 

 Scale of Life, the numbers decrease ; as we go down, 

 they increase. 



