Alcohol is used in disinfectants (think GermEx), and disinfectants are solely used to kill bacteria. And while we’re playing devil’s advocate, alcohol can also sterilize good bacteria, so it’s a toss ...

The slice of rock mounted on the glass slide is only ~30 micrometers (~0.001 inches ... thus reducing the exposure of sunlight to your relatively fragile eyes. In a petrographic microscope, the light ...

No prizes for guessing the first thing you'll need: a microscope ... the stage (the flat ledge the slide sits on) down to its lowest position. Place the glass slide onto the stage.