Show mankind Is learning flies rapidly which jot the myriad kinds of living things tare friends and which are enemies pesta that ruin crops are zealously studied and fought by the farmer but isome pests that endanger human ufa are tolerated because their ravages are not visible to the unscientific eye tit took brave experiment to discover ithac the mosquito Is a deadly enemy of man and a long campaign of aduca alon was necessary to prove the fact to the public the rat being odious and a destroyer of property was more easily proved to the public to be a dis ease bearing scourge the internal association for the scientific destruction of rats founded in den mark Is not a fantastic society as Is attested by the work in san francisco end other cities against this creeping vehicle of bubonic plague the mos quito and the rat have got to go and so has the housefly house fly which far from being only a buzzing nuisance causes thousands of deaths a year during the civil war it was found that flies carried gangrene this early dis covery has been explained by the later knowledge of disease germs the fly Js attracted to all kinds of filth his feet are barbed brushes which pick up dirt and his track across the food we eat is a path of pestilence when seen beneath the microscope he is the principal agent in tha spread of ty the increase of summer corn plaines plaints pla ints intestinal diseases is not due hot weather the human body aas lly adjusts itself to mere temperature but largely to the increase of aliea from may to august the tradition of the relation between filth and disease is sound and the clean housekeeper has always fought flies with screens and fly traps these old fashioned de tenses are still practical in addition bays the youths companion the keeper of horses should screen his manure pile and spray it with creosote or chloria of lime to allow flies on food s to run risk of disease to allow files to breed in or visit poisonous matter is to endanger one s neighbors |