1894.J MICROSCOPICAL JOURNAL. 55 



to that body that he had modified his stand so as to 

 admit of the use of the mirror for that purpose, the idea 

 liaving been suggested to him from England by a Mr. 

 Abraham, of Liverpool, and a patent was taken out for 

 this improvement also, though not till two years later. 

 Fig. 5 represents this second stand, which has now ar- 

 rived at its modern form. The sides of the drum have 

 been cut away so as to leave a flat pillar, and the round 

 foot has been modified, to correspond, into a horseshoe 

 form. The mirror, borne by a swinging arm, is adjust- 

 able vertically by means of a clamping screw. The stage 

 rotates, as before, with the body, but is now made square, 

 and the diaphragms and condenser are carried by a slid- 

 ing substage. A hinge for inclining is the only subse- 

 quent addition to this model ; and the smaller stands 

 with which we are more familiar in this country in the 

 hands of students, are derived from, and posterior to 

 the invention of this larger one, which continues to be 

 made by every Continental optician at the price of 10/. 

 or 151. 



In Fig. 6 and 7, I have added, for contrast, the type of 

 microscope current at the time of the introduction of the 

 Oberhaeuser stand ; it is that made by Chevalier for 

 Dujardin, and with which he worked. Like others of 

 the period, it is fixed for use by screwing into the lid of 

 its cabinet, and the focusing is efi;"ected by movement of 

 the stage. In the present specimen the compound body 

 can be lifted off the pillar, to be replaced by the arm 

 carrying a simple lens shown in Fig. 7, and by means of 

 a hinge and the interposition of a right-angled prism 

 above the objective, it can be used in the hori/.ontal posi- 

 tion. It is, in fact, a simplified form of the " Microscope 

 Universel " of Chevalier. Stands of similar form were 

 made by Plossl and others at the time, and were equally 

 superseded by the new pattern. — Journal of the Eoyol 

 MicroaoopioaJ i^ociety. 



