INVERTEBRATA, CRYPTOGAMIA, MICROSCOPY, ETC. 



955 



always place this joint at the side, so that the draughtsman cannot 

 avoid knocking (his nose) against it, or else is obliged to give a very- 

 fatiguing inclination to the head. This inconvenience may be avoided 

 by placing the joint not at the side, but at the anterior part of the 

 camera. 



In addition to this, the axis of movement is vertical, and when the 

 camera is removed from the eye-piece, it is difficult to put it exactly 

 back in the place it occupied, which is, however, very desirable. An 

 axis with horizontal movement would be much better, and by such an 

 arrangement the camera would be raised and lowered on the eye-piece 

 like the cover of a box. 



Zeiss' Travelling Microscope. — Fig. 6 represents the " Travelling 

 Microscope" of Hcrr Zeiss, of Jena, wbich was exhibited at the 

 November meeting of the Society. 



Fig. G. 



It consists of the Zeiss stand No. VI., the general construction of 

 which is sufficiently shown by the woodcut ; and it packs into a case 

 8| inches high by 4 inches stiuare. 



