THE FLY 187 



to show all sides of the foot and foot pads. This was 

 most difficult, as it had to be held perfectly true dur- 

 ing its revolution. I made a glass chuck-like device to 

 hold the leg, mounted it on a slide, put on a pulley 

 and, with its separate motor, revolved it during the 

 exposure. These steps take infinite time and skill and 

 the apparatus can seldom be used for any other 

 scene. 



The suction pads on his foot surrounded by claws 

 show how he walks on glass or other smooth surfaces. 



The scene of the fly as a health danger shows it 

 crawling on decayed cabbage, dirty open garbage 

 pail, in and out of a spittoon, then on a plate of 

 cookies, swimming in a milk pitcher, on the nipple 

 of a baby's bottle; then follows that of putting a fly 

 in a dish of sterile gelatine medium, showing him 

 walking over it back and forth, and one a few days 

 later shows the glistening colonies of bacteria that 

 have developed in his foot tracks and the bacteria 

 around the hairs on his foot. 



Mobile and miracle working as a camera is it took 

 animated drawings to express the increase of one fly 

 to over 50,000,000 in a year's time. 



The control of flies in the story was not possible 

 to carry out as well as I wished, so I made several 

 extra scenes showing how easy a chemical spray 

 killed them in the same pigpen used before, and 



