A male speaks in the background while a female looks through a microscope.
A woman put her eyes on the lens on a microscope
A person adjusts a microscope, then bends forward and looks through the eyepieces
A person tells how to use a microscope the right and how to look though it.
A scientist is giving a description of a microscope while he breaks the machine down.
A lady is looking through a microscope in order to look at an experiment.
A young woman looks into the lens of a microscope.
An instructional video which shows a woman looking down a microscope.
A women places a something under a microscope and then looks through the microscope.
A woman looks into a microscope while a man describes it.