76 



stituted for the double tube. The illustration shows such a camera, with time 

 and instantaneous shutter, lying at the side of the foot of the stand. For par- 

 ticulars of the construction and of the manner of using this camera refer to 

 DRUNER'S "Ueber Mikrostereoskopie und eine neue vergrossernde Stereoskop- 

 camera" in the "Zeitschr. f. wiss. Mikrosk.", vol. XVII, 1900, pp. 281293. 



Price : Code-word : 

 No. 97: Stand X b with stereoscopic camera fitted with 



time and instantaneous shutter ...... Marks 385. . Pasula. 



Stand X c . 

 Dr. s. CZAPSKI'S Corneal Microscope. 



The double tube is similar to that of the two preceding stands except that 

 an illuminating apparatus is fitted above the centre line of the microscope 



so that the optical axes of both tubes are directed upon the same field. This 

 illuminating apparatus contains a small incandescent lamp and a duplex 

 illuminator, both resting on slides so as to be adjustable, thus facilitating the 

 best possible lighting of the object. Fig. 37. 



As a rule we supply a small incandescent lamp, using a pressure of j or 

 8 volts with a current of i ampere, and j spare lamps. For feeding the lamp 

 it is best to use accumulators. If connection be established with an existing 

 electrical supply system, sufficient resistance must be provided. 



The double tube with its illuminator attachment is movable within the 

 vertical plane by means of a joint which works on a horizontal axis and may 

 be clamped in any desired position, while a vertical axis admits of the opposite 

 movement. The microscope is elevated or depressed by means of rack and 

 pinion and a second similar movement effects changes of position from front to 

 rear. The stand rests upon a substantial tripod foot, but it is a good plan to 

 place the whole upon the sole-plate of a chin-rest. At the suggestion of 

 Professor EVERSBUSCH this sole -plate is made so as to be movable in two 

 directions at right angles to each other. The movement of the plate - - and 

 of the stand with it - - from front to rear is effected by hand, that from right 

 to left by means of the milled head T. 



Fuller details of the construction of this stand are contained in GRAEFE'S 

 Arch. f. Ophthalm., vol. XL VIII, 1899, pp. 229235. 



Price : Code-words : 

 No. 98: Stand X c ivithout sole-plate or chin-rest . . Marks 220. . Patache. 

 99: zvith and . . 265. . Pataleo. 



The prices quoted above include only the stands and cases, but without objectives 

 and eye-pieces. 



Suitable complete specifications are appended at the end of this catalogue. 



