Using an optical microscope to view a prepared slide
1. Place slide on stage and secure with clips
2. Select lowest power (4x) objective lens
3. Slowly turn coarse focus dial to lower lens until it almost touches slide
4. Look through eyepiece and turn coarse focus dial to bring cells into focus
5. Use fine focus dial to sharpen focus
6. Calculate total magnification by multiplying eyepiece (10x) and objective (4x, 10x, 40x) lens magnifications