The Still is a machine capable of refining Biomass into Biofuel, at a 10:3 ratio (for every 10 Biomass buckets processed you get 3 Biofuel buckets).
If you have Buildcraft installed, you can do the same process in a Refinery, for a 4:1 ratio.
This means that this machine probably won't be very useful to you if you don't have Buildcraft or IndustrialCraft² installed.
The Still's GUI is divided into five areas:
I - Liquids Input Slot
Place Biomass Cans/Cells/Buckets in here, in order to fill the Biomass Tank (II).
II - Biomass Tank
This tank shows how much Biomass is currently in the Still. Up to 10 Buckets worth of Biomass can be stored here.
III - Biofuel Tank
This tank shows how much Biofuel is currently in the Still. Up to 10 Buckets worth of Biofuel can be stored here.
IV - Empty Can Slot
You can place Empty Cans/Buckets to fill them with Biofuel from (III). Filled Cans go to (V).
V - Filled Can Slot
Filled Cans end here.
As is the case with most machines, the more power you supply, the faster the Still will work up.</note>