1) The document provides instructions for preparing three types of biological stains - Wright stain, Leishman stain, and Giemsa stain. It details the materials, reagents, and procedures needed to make each stain. 2) For Wright stain and Leishman stain, the dye powder is dissolved in acetone-free methanol and stored in tight bottles. For Giemsa stain, the dye powder is dissolved in a mixture of glycerin and methanol to make a stock solution, which is then diluted before use. 3) The stains are used to stain blood smears and bone marrow samples to study blood cells, parasites, and other anatomical details microscopically.