ZOOLOGY AND BOTANY, MICROSCOPY, ETC. • 519 



The following is a translation of the description as given in the 

 original test : — 



" More ingenious still was the next invention shown in figure 5 

 [fig. 106] in which A B is a stand of wood : C is a bent iron sj)riDg, 

 carrying the ring D in which is inserted the lens : E is a thin string, 

 which causes the spring C to move upwards or downwards by means of 

 a small peg F on which it is woimd. The objects are placed around 

 the circumference of a disk G which is attached to a screw-peg H, 

 by which the object is adjusted perpeudicularly under the lens D." 



The writer of the pamphlet does not give the name of the in- 

 ventor of the Microscope, but he refers to this and other models in 

 terms which suggest that he had had some experience with them. It 

 is of interest as being the earliest example of a drum-carrier for a 

 number of objects, and therefore in this respect displaces Winter's 

 " Kevolver " Microscope described inYol. lY. (1884) pp. lli-S. In 

 view of the extreme improbability of ever meeting with one of these 

 instruments we have had one constructed closely to the original. If 

 it survives to a later age this notice may serve to prevent its being 

 accepted by posterity as a genuine model, a mistake which the 

 imitative skill of the workman has rendered possible even at this 

 period. 



Miiller's Insect-catcher with Lens— Insect-cages.— Herr P. Mullet 



has designed * the instrument figs. 107 and 108 to serve the double 

 purpose of catching and observing insects. 



It consists essentially of a glass tube having at one end a lens, 

 and inside, close to the focal point, an adjustable mica-plate. A plug 

 is passed up the tube, on which the insect is brought to the focus of 

 the lens. A conical catcher at the opposite end of the tube serves 

 for catching the insect, and can be used as a stand during observation 

 with the lens. 



The lens h is attached to the glass tube a, the inner surface of 

 which is ground as far as a — (3. At d is the mica-plate, between the 

 spring rings c c, and at ef is the catcher. 



The following is translated verbatim from the inventor's specifica- 

 tion : — 



" In use the instrument is taken with two fingers by the ring /, 

 and quick as lightning placed over the insect to be caught, whether 

 it is on level ground, on a hedge, or on the side or top of a wall. 

 With skill and the necessary caution the capture is generally success- 

 fully effected. It is still more certain if the insect happens to be on 

 an accessible leaf, blade of grass, twig, or flower. In such a case the 

 insect-catcher is held in the way described, and cautiously brought 

 near to the insect. At the same time the open left hand is brought 

 near the insect from the opposite side, and as soon as the capture 

 seems certain the funnel and the hand are brought together over the 

 insect. All the different kinds of flies, gnats, moths, and such others 

 as seek the light will quickly be seen in the illuminated glass tube, 

 from the top of which they will seek to escape. The plug h is now 



* Specification of Germau Patent, 6th June, 1SS3, No. 25,806. 



