This document provides instructions for preparing different types of stocks, which are flavorful liquids made by simmering bones and vegetables. It discusses how to make white stock from chicken, veal or beef bones along with mirepoix vegetables. Brown stock is also covered, which requires first browning the bones and vegetables in the oven before simmering. Precise techniques are outlined, such as skimming scum, maintaining water levels, and rapid cooling of finished stocks. The stocks can be refrigerated for a few days or frozen for months.