WARINGTON S UNIVERSAL MICROSCOPE. 



lOT 



FiQ. 26. 



brass socket let into the wooden support, thus completing the 

 Microscope in the form represented in Pig. 25. This is not the 

 last of the adaptations of which the instrument is capable; for the 

 wooden support remaining at the same inclination, the body may 

 be brought to the perpendicular, by shifting its_ stem in the clamp 

 and by altering its angle at the cradle-joint ; whilst a horizontal po- 

 sition may be given to the stage, by fitting it into another socket 

 (Fig. 26) ; in this arrangement, 

 moreover, the stage acquires an 

 increase of firmness, from the 

 bearing of a plate that projects 

 at right angles from its under 

 surface, upon the inclined face 

 of the wooden support. Thus a 

 dissecting microscope is form- 

 ed^ which has many of the ad- 

 vantages of that of Messrs. 

 Smith andBeck; being subject, 

 however, to the important 

 drawback, that the mirror can- 

 not be so placed as to reflect 

 the light upwards through the 

 axis of the microscope. (A 

 means of remedying this, how- 

 ever, might perhaps be con- 

 trived without much difiiculty 

 or cost.) On the left side of 

 the slanting support, at a short 

 .distance above the stage, is a 

 hole into which may be fitted 

 either the stem of a condens- 

 ing lens for opaque objects, or the stem of the stage-forceps ; 

 either or both of which may also be fitted into holes in the front 

 corners of the stage. The stage is provided with a sliding ledge 

 for the support of objects in an inclined position ; and it might 

 also be furnished, if required, with a diaphragm plate. One of 

 the chief merits of the instrument, however, being lightness and 

 portability, it would not be desirable to encumber it with many 

 accessories. For convenience of packing, the shorter portion ot 

 the J. piece may be connected with the longer by strong pins 

 fitted into sockets, instead of being permanently fixed, so that the 

 two can be readily disconnected and one part laid fiat upon the 

 other ; and the whole apparatus will then lie within a very small 

 compass.. The distinctive peculiarity of this instrument consists 

 in the extreme simplicity of the means by which a variety of 

 useful ends are obtained. It is scarcely one that should be re- 

 commended to the beginner ; since it is in several respects not 

 so well adapted for ordinary work, as the forms already described. 

 But it is a most valuable addition to the Microscopic apparatus of 



Waiiiigton's Universal Microscope, arranged for 

 dissecting on the stage. 



