214 THE RISE AND FALL OF DISEASE 



Screen all food exposed for sale. 



Screen all windows and doors, especially the kitchen 

 and dining-room. 



Don't forget, if you see flies, their breeding place 

 is in near-by filtli. It may be behind the door, under 

 the table or in the cuspidor. 



If there is no dirt and filth there will be no flies. 



If there is a nuisance in the neighbourhood write at 

 once to the Health Department. 



ACTION OF THE LOCAL GOVERNMENT BOARD 



The Local Government Board instituted an enquiry 

 in 1908 into the question of flies as carriers of disease. 

 As a result very useful investigations have been 

 undertaken, under the supervision of Dr. INIonckton 

 Copeman, to establish the part taken by flies in 

 propagating disease. The flies are caught in special 

 fly-traps, and are carefully examined. Additional ob- 

 servations have also been made upon the places 

 where they breed, and the distances which they are 

 capable of flying. Bacteria of the Colon bacillus type 

 were isolated from the flies in many cases, thus 

 demonstrating the filth-feeding nature of the fly, and 

 that it is capable of transmitting bacilli which cause 

 disease in man. 



