ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



703 



last peculiarity and the device of the two inclined lenses constitute tho 

 chief novelties of the instrument. 



The loup may be mounted in various ways. In fig. 152 it is fitted 

 on a simple frame, and this forms a pocket instrument. In fig. 153 it is 

 seen on a simple stand ; and in fig. 154 it is arranged for more elaborate 

 work. The figures of these mountings seem to explain themselves 

 so clearly that detailed description is not necessary. The instrument 

 is manufactured by Fritsch of Vienna. 



Fig. 155. 



Seibert's New Demonstration Loup. — In this apparatus (fig. 155) 

 the loup is set in a right-angled carrier, whose base is pierced by a rect- 

 angular slot. In this slot slides a screw, which serves as the tongue of 

 the object-carrier. When the focus has been found by sliding the 

 object-carrier into the proper position, the whole is tightened up by 

 rotation of the wooden handle. 



Seibert's Loup Stand. — In this apparatus (fig. 156), which is upon 

 Fritsch's model, the pillar allows an elevation of the whole stand as 

 well as a rotation of the loup arm. This arm can, by a push-motion 



