When the hopper lever is operated, grain from the hopper falls
through the upward flowing air current for an initial cleaning.
The 'stives', consisting of the chaff and any other light rubbish,
are sucked away from the grain as it falls through the machine.
Some are retained in a central waste section of the machine but
the lighter portions pass through the fan and are collected in
the 'stive room', a separate area enclosed by sacking (not shown
in the picture).
Requests for more grain to be tipped into the Aspirator hopper
can be made by the operator of the Winnower on the Stone Floor.
The handle on a cord is pulled to ring a bell in the Garner, hopefully
to be followed by the sound of partially cleaned grain entering
the small storage bin above the Winnower. The grain can then be
released into the Winnower hopper as
required for additional cleaning and sieving.