14 



Considering the total (including unmarked weevils) of 124 weevils 

 found, the cleaner feeder separated 71 per cent of the total number. 

 "Weevils in the seed numbered 16, or 13 per cent of the total found. 

 In the motes 20 weevils were found, or 16 per cent of the total. 

 Among 88 weevils from the cleaner feeder 83 per cent were alive. 

 Among 16 weevils from seed 66 per cent were alive. Among 20 

 weevils from motes 55 per cent were alive. Fifty-seven per cent of 

 the marked weevils could not be accounted for. 



Summary of experiments in passing weevils through gin machinery. 



Nature of experiment. 



Method of recovery. 



Number 



of 



marked 



weevils 



used. 



Found alive. 



Num- 

 ber. 



Per 



cent. 



Found dead. 



Num- 

 ber. 



Per 

 cent. 



Per 

 cent 

 lost. 



Passage through fan 

 only. 

 Do 



Passage through saws 

 only. 

 Do 



Through cleaner 

 feeder and motes. 



Through cleaner 

 feeder and saws. 



Blown on sheets spread 

 in seed house. 



Bunting bag at discharge 

 in car. 



Seed caught on floor. No 

 motes. 



Seed caught on floor. 

 Motes examined. 



Trash and motes a col- 

 lected and examined. 



Trash, b motes, and seed 

 collectedand examined. 



105 

 100 

 50 

 160 

 250 

 200 



3S 

 64| 

 34 

 34.5 



29 



90 



20 

 5J 

 3.6 

 8.5 



71 



10 



42 



30 



62.4 



57 



aOf 94 weevils (dead and alive) recovered, 13 (10 dead and 3 alive) were at mote board, 

 b Of 86 weevils (dead and alive) recovered, 11 were found in seed, 14 in motes, and 61 in trash from 

 cleaner feeder. 



WHAT THE EXPEBIMEXTS HAVE DEMONSTRATED. 



From the above-described experiments and many observations it 

 has been demonstrated that seed cotton carried by the powerful suc- 

 tion of the fan may strike directly against the wire-screen separator 

 and the weevils contained may not be injured in the slightest degree. 

 These same weevils ma,j be again taken with this same seed cotton 

 from the storage house and driven against another distinct wire-screen 

 separator in the pneumatic system. Thence they may pass down 

 through the screens at the rear of the picker roller in the cleaner 

 feeder and may be carried along with other foreign substances sepa- 

 rated from the seed cotton by the screw conveyor connected therewith. 

 In case the insects pass through the screen in the pneumatic elevator 

 chute they pass through the main fan and are killed. In case, how- 

 ever, they are not separated from the cotton by the picker roller in 

 the cleaner feeder they may pass through tho saws of the gin with the 

 seed into the seed chute, or drop with the motes from the mote board. 



PRESENT SYSTEMS OF HANDLING AND GINNING SEED COTTON. 



In the following pages, practically all of the methods of handling 

 and ginning seed cotton in use in the United States at the present time 

 will be discussed, with a view to pointing out the weaknesses of the 



