ZOOLOGY AND BOTANY, MIGROSCOPY, ETC. 



417 



Fig. 64. 



ordinary small monocular instruments, viz. 9 in. x 5 in. x 5 in. A 

 larger number of cements coiild be carried if the bottles were of a 

 slightly smaller size, and it is proposed that, instead of the outside 

 case being of polished mahogany, it should be of painted canvas, 

 such as portmanteaus are made of. 



Whilst specially constructed for travelling, the instrument may 

 be useful to workers, as comprising in a small compass many things 

 necessary for microscopical work. 



Klonne and Miiller's and Seibert's Demonstration Microscopes. 

 — In Klonne and Miiller's instrument (fig. 64) the body-tube, with the 



eye-piece and objective, slides (for 

 coarse focussing) in an outer tube, 

 and can be secured in any position 

 by the screw acting oh a split ring 

 at the upper end of the outer tube. 

 At its lower end the latter tube 

 is screwed to a plate about 3 in. 

 square with four supports at the 

 corners, on which the instrument 

 rests when it is not in use. 

 Beneath this plate is a second 

 one, which is attached to the 

 former at one side only, and is 

 movable on a hinge joint. Two 

 springs between the plates pull 

 them together, and a screw (shown 



Fig. 65. 



above the upper plate) forces them apart when desired and forms the 

 fine focussing movement. 



The slide is placed beneath the lower plate, and is held in 

 position by two spring "clips. 



Ser. 2.— Vol. III. 



2 E 



