set of instructions for smelting iron, aka set of instructions for smelting iron, smelting, and iron
A set of detailed instructions for extracting pure iron from ore.
It tells you how to make an iron bar with the following components:
Making this would take decent familiarity with craft.
In the upper right corner is a note: 'First discovered by Dr. rice.'
It weighs about 100 grams. It is a blacksmith pattern. You have no idea what it might be worth.