Brain

Purity values: Salt 35.11, Hg: 14.28, S: 38.09, Pb: 12.50

The brain is obtained when butchering an animal. While it can be studied as an Inspirational, it's main purpose is to prepare water as Tanning Fluid for tanning a Limed Hide. To do this, pick up the brain and then right click on a Bucket of water or a filled Tanning Tub. One brain in 10.0 L of water makes a 5.0% solution of Tanning Fluid.