Evolution in General 



time of any of these ages is hundreds of times as long as the 

 whole of history; that life has been on this earth for a 

 period of, perhaps, a thousand million years; that by prob- 

 ing down into the earth, they find that the deeper they go, 

 the simpler are the forms of fossilized life revealed there, 

 until finally no life can be found at all. 



We go next to the workshops of the botanists and we 

 find them in the garden, on mountains and in the val- 

 leys, in the deepest jungles, studying the plant life of this 

 world. They tell us that some of the plants are our friends 

 and some of them are our enemies; that all animal life lives 

 and is dependent on plant life; that all plant life is strug- 

 gling for existence and adapting itself to its surroundings; 

 that there is fossilized plant life the same as fossilized ani- 

 mal life; that plant life is older than animal life and that 

 the deeper down in the earth's formations they go, the sim- 

 pler plant life becomes, and finally no plant life can be found 

 at all. 



We then go to the workshops of the biologists and we 

 find them in their laboratories with microscopes, test tubes 

 and culture pans studying the forms of life, how they are 

 builded up, and the uses of their different parts and their 

 relation to each other. They tell us of the kinship between 

 plants and animals; of the myriads of animals that cannot 

 be seen with the naked eye; of th^ grouping of the cells; of 

 the foods they eat and how each part is related to the whole, 

 each performing its separate, yet, related function. 



We go next to the workshops of the physicists and we 

 find them in their laboratories surrounded with all kinds of 

 delicate instruments — measuring the speed of light, study- 



[i9l 



