A mechanism mounted on top, or as part, of the stage that allows the operator to move the specimen slide in the X or Y direction by turning a knob. Very useful at higher magnifications as it can be difficult to move the slide by hand otherwise since it must be moved such a small amount. Also, moving by hand can be difficult since you must move it in the opposite direction. Most mechanical stages come with a graduated scale so you can see how far the slide has been moved or keep track of the position of various objects on the slide. BACK
A mechanical way to move the slide around on your stage. The mechanical stage consists of a slide holder and two knobs. Turn one knob and the slide moves toward or away from you. Turn the other knob and the slide moves left and right. Since everything is upside down on a (high power) microscope it takes some getting used to but it is very convenient to have one especially when observing moving specimens like protozoans or other pond water critters. Microscopes either have the bolt on mechanical stage that can be added (to many models) at any time or the integral mechanical stage that comes built in to the microscope.
A device which allows slides to be precisely manipulated with control knobs. It is invaluable when viewing at higher magnifications. ( picture)