Dissecting Lenses 

 and Hand Magnifiers. 



In addition to the objectives and eye-pieces included in complete micro- 

 scopic sets we also supply a variety of dissecting combinations and hand magni- 

 fiers, some of them exclusively intended for use with our dissecting stands and 

 lens holders, others suitable for use as hand lenses also. 



In the construction of these lenses our special aim has been to combine 

 ample working distance with the greatest possible flatness of field. 



We supply three different forms of a lens based upon the type evolved 

 by BRUCKE - - combination of a collective with a dispersive element - - viz : 



l. * Dissecting Combination Lens, No. 1, Fig. 40 P. The collective 



element, which consists of three achromatic lenses, is combined with an achro- 

 matic dispersive lens serving also as eye-piece. As the component collective 

 lenses may be used separately as well as in combination with the dispersive lens, 

 a useful series of six conveniently graduated magnifications (see Table), varying 

 between X H an d 100, combined with a comparatively large working distance 

 (from 6 to 26 mm), can be obtained. 



This dissecting combination lens is primarily designed for use with our 

 Dissecting Stands PI and Pill. 



