FIBER CKOl'S 



369 



469. Gins. There are two kinds of gins : roller gins and saw 

 gins. The roller gin has been used in India under the name 

 of churka since ancient times. Sea island cotton is ginned ex- 



Diagrammatic section of saw gin 



A Grate-fall Head or End of Breast. 



B Seed-board. 



C Saw-cylinder. 



D-Saw. 



E Grate. 



F Lever for raising Grate-fall. 



G Wind-board. 



H Adjustable Hollow. 



I- Sliding Butt. 



J Patent Brush. 



K Sliding Mote-board. 



L Bottom Board. 



M Movable Iron Plate with Teeth, 



to regulate cleaning seed. 

 N Screw to adjust the Iron Plate M. 

 O Iron Brush Guard. 



clusively on a roller gin. While the roller gin gives the best 

 results for long staple upland cotton, yet the saw gin is usually 

 used for this type of cotton on account of its greater capacity. 

 The invention of the saw gin as patented by Whitney and 

 Holmes more than a century ago, has greatly affected the cotton 

 industry. The improvement in gins since that time has been 

 in perfecting mechanical details and the adoption of labor sav- 



