rotated in a counter clockwise direction as viewed in fig9 so that the fingers tend to toss the cotton upwardly and inwardly into to a plenum chamber 234 defined by a back wall 235 of housing 221 and portions of the side walls 218 a bottom portion of bed 26 of cart 23 forms the temporary bottom of the plenum chamber 234 the accumulation of the cotton in the plenum chamber 234 can be viewed through a window 236 in wall 218 as seen in fig9 the shafts 222 are arranged at an incline so that the uppermost shaft 222 is forwardly of the lowermost shaft 222 so that all shafts 222 are in a common inclined plane with respect to the path of travel of the module 15 thus the fingers 230 of the uppermost shaft 222 first engages the end of the module 15 as the module 15 is initially fed inwardly into housing 221 disposed at the bottom portion of the plenum chamber 234 is a transversely disposed conveyor auger 250 seen in fig7 this auger 250 has a central shaft 251 and a helical blade 252 shaft 251 is driven by a separate variable speed motor not shown outwardly of the plenum chamber 234 on one side thereof is an air box separator 260 own in fig7 a and 10b this air box separator 260 is a generally a cubical shaped member having side walls 261 and 262 a top 263 and a removable end plate 265 a bracket 266 on the end plate.