the coarse adjustment knob
it is the COURSE adjustment knob
This is the coarse adjustment knob. This should be used before the fine adjustment knob (the smaller knob) - which is for fine focusing.
A dissection microscope is called a stereoscopic microscope. It has low magnification that is useful for viewing large, thick objects.
suitable for viewing large objects
In compound microscopes for use for viewing thin sections at high power, specimens are mounted on a microscope slide and covered with a coverslip and are placed on the microscope stage or base plate. In stereomicroscopes the same is done however for large objects such as rocks or minerals no microscope slide is required the object to be observed is placed directly on the stage.
Microscope
The development of the cell theory started when the first microscope was made and the discovery of cells happened. The microscope was a large advancements in technology.
Always carry the microscope with two hands, one on the base and one on the arm, to prevent dropping or damage. When focusing, use the coarse adjustment knob first for large adjustments, and then the fine adjustment knob for more precise focusing.
it is the course focus
In the first week an embryo is only a few cells large....barely able to be seen under a microscope.
To bring an object into focus on a microscope, you should start by placing the specimen on the stage and selecting the lowest magnification lens. Next, use the coarse focus knob to move the microscope stage upward until the object is visible, then use the fine focus knob to sharpen the image.
A dissection microscope is called a stereoscopic microscope. It has low magnification that is useful for viewing large, thick objects.