APPENDIX 

 I. THE COMPOUND MICROSCOPE 



The following simple outline is given for the use of 

 beginners with the microscope. It may be enlarged by the 

 teacher : 

 PARTS. 



I. Stand. 



1. Base : The part on which the instrument rests. 



2. Joint : Allows the upper part to move on a hinge. 



3. Body: The part above the joint. 



4. Adjustments : 



a. Coarse, upward movement accomplished by 

 the rack and pinion. 



b. Fine, accomplished by the thumbscrew usu- 

 ally at the top of the stand. 



II. Stage. 



1. Floor: The surface of the stage bearing the clips 



or holders. 



2. Diaphragm: Contrivance under the opening in 



the stage, to regulate the amount of light trans- 

 mitted. 



3. Mirror: A moimted adjustible mirror situated 



below the stage to reflect the light through the 

 the object into the objective. 

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