1893.] MICROSCOPICAL JOURNAL. 215 



7.— vSLIDK- BOX. —FIGURE 4. 



One must have u box or case in which to kee|» prepared slides. 

 Take ci{^ar boxes, clean tlieni well, paste clean whit<' ]»aper into 

 the sides and bottom of the box. Some may prefer to leave it 

 without pajier, thinkinj^ the i)aste or glue with which the pa- 

 lter is glued may draw dam|)ness or mould. I have never had 

 any trouble in that way. 



Make trays, in which to place the slides, of such si/e as that 

 they will slide in and out nicely. Take other cigar boxes and 

 form sides and ends. Cut strips J inch or a little less in width. 

 Make sides and ends, and ])artitions to separate the slidesf Fig. 4). 

 Makethe partitions i inch wider than the slide. Glues on paste- 

 l)oard or card board for bottoms. Put small ears of ribbon on 

 the ends to lift by (a. a, in the figure). Make enough trays to 

 fill the box. Keep your slides flat and not edgewise. Many a 

 good slide has been spoiled by being kept edgewise for some 

 time. 



a— CAMERA LUCIDA.— FIGURES 5, 6, 7 AND 8. 



If you have no camera lucida, you can easily make one. Take 

 a cork, one inch or more in diameter, and one-half inch 

 in thickness, bore in the center a hole t of an inch in diameter, 

 more or less. It need not matter especially, as in Fig. 5. 

 Make two small Ijoles above the large hole, with a small awl. 

 Put them about 5 inch apart (a). Bend a small wire or a hair 

 j)in, in the shape shown in Fig. 7, the points, a a, being the 

 same distance apart as the small holes in the cork. Push the 

 wire through the holes and down, as at b in Fig. 6, and about I 

 inch from the cork. Make a notch or slit in the cork (c), and into 

 this place a nicely cleaned, three-quarter inch, circular cover. 

 Your camera lucida is completed. Slip the wires over the eye- 

 piece so that the hole in the cork comes over the glass, turn 

 the tube down, and it is ready for use. — Figure 8. 



9.— GLASS PIPETTS AND BULBS.— FIGURES 9 AND 10. 



Glass pipetts are convenient. Take a glass tube, heat it in 

 a hot flame, or have your jeweler do so, then draw it out to a 

 fine thread (Fig. 9). 



Break at A, and you will have two glass tubes, each with fine 

 points. For a l)ulb, get a nijtple such as is used on nursing bot- 

 tles. When finished, it will resemble Fig. 10. 



