During the two world wars horse chestnuts were gathered and used as a source of starch. This starch was used via the Clostridium acetobutylicum fermentation method (devised by Chaim Weizmann) to produce acetone.
This acetone was then used as a solvent which aided in the process of ballistite extrusion to make cordite.
This acetone was then used as a solvent which aided in the process of ballistite extrusion to make cordite.