10 



PRICES OF THE THIRD CLASS, 



OR 



EDUCATIONAL MICROSCOPE 



AND 



APPARATUS. 



This Microscope is intended to meet a want that has been much felt 

 by students and others, who have been desirous of possessing an instru- 

 ment equal to their requirements, whether in Physiology, Chemistry, 

 or the minute forms of animal or vegetable life, but have not been able 

 or not disposed to incur the cost of such as are larger or more elaborate. 

 To these, that which is now submitted to their notice is believed to 

 offer peculiar advantages ; in the convenience of its structure and its 

 very moderate price, in connexion with its capabilities and the quality 

 of its workmanship. 



£ s. d. 

 The Microscope — with 1 inch and $ inch Object-Glasses, 

 having the respective apertures of 22 and 75 degrees, 

 and two Eye-pieces ; a firm Stand with a joint for 

 varying the position, quick and slow motions to the 

 body, a Stage with springs that allow any motion to 

 be given to the object ; concave Mirror with complete 

 adjustments ; a side Condensing Lens ; Diaphragm 

 with a shutter ; Forceps ; Glass Plate, and pair of 

 Pliers; packed in a strong Mahogany Case 10 



ADDITIONAL APPARATUS. 



Mahogany Board, required for packing any of the following 



parts „. 7 6 



Lieberkuhn to 1 inch object-glass, and dark well 12 



Wenham's Parabolic Reflector, for " dark-field illumination" 10 

 Flat Mirror (in which case, a double one is substituted for 



the single concave one which has to be returned) ... 7 6 



Polarizing Apparatus, complete with prisms and selenite ... 1 12 6 



Wollaston's Camera Lucida, for drawing an object 15 



Glass Micrometer, ruled into Troths an< l i 'o -ths of an inch. 5 



Small Live Box 5 



Glass Trough, complete with wedge and spring 6 6 



All the above " Additional Apparatus" if ordered at once ... 5 



