CONTENTS, 



Page. 



Cotton seed and ginneries as factors in the spread of the boll weevil 5 



Control of boll weevil in seed by fumigation 6 



Fumigation experiments 7 



Means and method for successful fumigation 9 



Summary of results of fumigation experiments 11 



Controlling the boll weevil at ginneries 12 



Experiments to determine effects of machinery on live weevils in seed 



cotton 12 



What the experiments have demonstrated 14 



Present systems of handling and ginning seed cotton 14 



Hand system at seed-cotton storage house .' 15 



Carrier system of unloading seed cotton into storage house 15 



Suction system of conveying seed cotton from wagon to storeage house 15 



Hand and basket method at ginhouse 17 



Pneumatic system with belt distributors 17 



Pneumatic system with cleaner feeders 18 



Separate cleaners 21 



Gins 22 



Handling cotton after ginning 23 



Suggested improvements in devices for handling and ginning cotton 24 



In the seed-cotton storage house 24 



In the ginhouse proper 25 



Controlling the boll weevil at oil mills 28 



Summary of recommendations 30 



3 



209 



