15 



several systems in regard to destroying or controlling the boll weevils. 

 The matter is a rather complicated one, owing not only to the diversity 

 of the different systems of ginning the staple, but the frequent com- 

 bination in one plant of parts of these different systems. Moreover, 

 there is at present considerable activity in the improvement of ginning 

 machinery, resulting in frequent important changes. This discussion, 

 however, will enable any ginner, no matter what his system, to learn 

 the exact point at which the weevils escape, and will consequently 

 show him in what manner the danger of disseminating the pest may 

 be avoided. Moreover, several new suggestions in regard to special 

 cleaners are made in the following pages, and it is hoped that manu- 

 facturers and ginners will be able to make use of them. 



HAND SYSTEM AT SEED-COTTON STORAGE HOUSE. 



This class of storage house is used principally in localities where gin- 

 ning for custom is done exclusively, where farmers desire to bring a 

 portion of a load of cotton at a time, allowing it to accumulate until 

 it amounts to a bale or more, and at large ginneries during the latter 

 part of the season when the gins are not running full time. The seed 

 cotton is placed in bins without any special machinery whatever. At 

 gins where the seed cotton is unloaded by this system it appears that 

 all boll weevils must pass with the seed cotton into the gin house. 

 The ginner must therefore depend upon devices in the gin house 

 proper, to be described later, for separating weevils from the seed cot- 

 ton. It is therefore unnecessary to enter into details of unloading 

 seed cotton by hand. We may take up the more modern systems of 

 unloading by mechanical devices, which keep the boll weevils under 

 more or less control. 



CABRIEB, SYSTEM OF TTNIiOADING SEED COTTON INTO STORAGE 



HOUSE. 



This system consists of an endless apron running from the wagon to 

 the bins. It was in use previous to the advent of the more modern 

 method of blowing seed cotton to the storage house or to its various 

 compartments. As far as the control of the boll weevil is concerned 

 it does not differ from the hand system. 



SUCTION SYSTEM OF CONVEYING SEED COTTON FROM WAGON TO 



STORAGE HOUSE. 



This system can be conveniently presented under three heads: (1) 

 With safety fan; (2) with one fan and vacuum box; (3) with two fans 

 and vacuum box. 



With safety fan. — In the safety -fan system the seed cotton is drawn 

 from the wagon by suction, and is separated from the air current by 

 a screen within the fan. The blast from the fan is used to blow the 



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