

MANY people still doubt the existence of bacteria and of germs 

 generally. Their disbelief is based chiefly upon the fact that 

 these minute organisms are invisible to the naked eye. If they 

 were as large as the poisonous plants and snakes with -which we are familiar, 

 their existence and the effect of their poison would no longer be doubted. 



The remarkable photograph reproduced on this page was taken from 

 the top of the tallest building in the world. It serves to illustrate how 

 small the largest members of our species woulif look to a man 750 feet tall 

 who had out present power of vision. 



The photograph shows that to this ijian human beings would appear as 

 minute insects, moving slowly around bis feet. He would need a magnify- 

 ing glass to see small animals and birds on the earth's surface, and such 

 insects as mosquitoes and flies would be entirely invisible and yet how 

 ' easy it would be for even one of those small human "insects" to poison 

 this giant. A very small coramy of them could almost instantly annihilate 

 him. 



It is a mistake to ignore the exigence and the influence of the unseen 

 life of the world of the infinitesimml, just as it would be unwise for our 



.... ^ giant to ignore thcfxiscencefand the power 



^ , ; of the human atoms scarcely as high as the 



'"'JA s l es f his shoes. 

 W r *'/*?'.'. One of these dimly seen afoms, with 



a few sticks of dynamite, cojpld cripple ^*1^ F 

 \ Human beings. tms monster-man for life. Diphtheria 



; seen from T50 feet It isn't wise to ignore the existence of Germs 



in the air. . . . Magnified 



the tiniest living thing. 



The microscope has disclosed the fact that there are worlds of animal 

 and plant life so exceedingly small as to be almost beyond the reach of our 

 most powerful glasses. That there are still other worlds of still smaller 

 organisms, entirely beyond the power of our microscopes, can be readily 

 conceived. 



Human intelligence is slowly but surely penetrating the mystery of life 

 in this unseen world. 



Science has discovered the vital influence which some of these myriads 

 of living but invisible organisms have upon human life. 



The knowledge thus gained has proved to be the greatest discovery 

 ^es for it has taught us how to conquer such devastating plagues 

 '*<> *vohoid, yellow fever, diphtheria, etc. and this mar- 

 y, but for all time. It will go on 

 ^eath during all ac^ c -+ :i ** 



