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Insert both ends of the nail through the holes in the metal strip. There should be enough friction to keep the-mirror at the desired angle. Completed Mirror c. Notes (i) The slide containing the specimen to be observed is placed over the hole in the stage. Light is reflected through the specimen and lens by means of the mirror. Coarse adjustment is obtained by varying the position of the lens mount with the lens mount holder bolt. Fine adjustment is attained by turning the adjustment knob so that it moves the metal portion of the lens mount up and down.

Remove the -27nut from the impression in the wood thus formed, and Lens Mount Holder place a drop of strong glue in the impression and replace the nut. Be sure not to get glue in the threads of the nut or in the hole (this may be avoided by allowing the nut to dry with the bolt run all the way through the hole). Finally, glue, nail or screw the lens mount holder to the / Base and Stage Assembly (3) Lens Mount base and stage assembly. Make a slit in the end of the piece of wood (H), with a saw. This slit should be about 1 cm deep and slightly wider than the thickness of the metal sheet (I) used.

Dropper \ (2) Cap (1) Tube a. 6 cm diameter Cap 1 Rubber Tubing (B) 4 cm long, 1 cm outside diameter 2 Soft Wire (C) 4-5 cm long (2) b. Construction (1) Tube Hold the glass tubing (A) over a hot flame, turning Heat it to heat it evenly. When it begins to soften, draw it out until the constriction is the desired diameter, and t Draw out allow it to cool. When cool, cut the tubing at the constriction with a small triangular file.

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