he experimented with multiple lens placed in a tube. the object in front of the tube appeared greatly enlarged
A draw tube is one of two tubes that is in a monocular microscope. It is the tube that carries the eyepiece.
The Eyepiece (ocular) contains the lens at the top of the body tube on a microscope.
The Body Tube
ocular lens
body tube - for microscope
It is important that the conjunctiva in which the plate is placed is not scarred; that the cornea is clear; and that there are no attachments of the iris to the lens behind it or to the cornea in front of it.
the ocular lens sits higher up, closer to your eye. the objective lens are in the objective tube below the ocular lens
The objective lens focuses and magnifies the object and transmits this image into the body tube of the microscope.
The objective lens focuses and magnifies the object and transmits this image into the body tube of the microscope.
Specimens are placed between glass slides which are then placed between a light source and a magnifying lens. There are focusing adjustments which change the magnification of the lens.
Tube is the second microscope part from the top. The tube connects the eyepiece or ocular lens to the objective lenses.