ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



105 



scope I, which is necessarily of somewhat low power, and has a focal 

 distance of 53 mm. The endless band is moved by two handles at the 

 sides of the outer box, which turn the upper axle. The slides can be 

 illuminated by direct light through the opening F, in the opposite side 

 of the box, or by the mirror E, shown in figs. 3 and 4. The Microscope 

 is focused by the milled head at q. The slides can be placed in position 



Fig. 3. 



by raising the top of the box B (fig. 5), or if a more extensive inspection 

 of the interior of the box is required both front E and back G (hinged 

 at the bottom at e and g) can be turned away as shown in fig. 5. 



The manner of fixing the slides is shown in fig. 6, A from in front, 

 B from above, a a in the one fig. and & & in the other are the two spring 

 jaws which hold the slides firmly in position. A disc with four notches 

 is attached to one end of the upper axle, and a spring falling into a 

 notch, indicates when a slide is exactly vertical. 



An arc-piece with rack and pinion (B c, fig. 4), enables the whole 

 instrument to be inclined to suit the convenience of the observer. 



The lenses can be attached to a special stand, and used as an ordinary 

 Microscope. 



With the Microscope Prof. Lenhossek sent a portfolio of manuscript 



