238 



BENJ. PIKES, JR,, DESCRIPTIVE CATALOGUE. 



Fig. 755. style of achromatic microscope. It is 



mounted on a tripod stand, the legs 

 of which fold under each other, for 

 portability, when packed in its case. 

 The various parts, viz. the reflector to 

 illuminate the object to be viewed ; 

 the stage, with its various appendages 

 for holding the object ; and the eye- 

 piece, with the different powers, are 

 supported on a cylindrical column, an 

 adjusting motion being given to the 

 stage, in a very superior manner, by 

 the milled-head screw, at the top of 

 the column. With this instrument 

 there are five achromatic object- 

 glasses, of different powers, an illu- 

 minator for opaque objects, set of 

 prepared objects, dissecting instruments, &c. ; the frame- 

 work made of brass, highly finished, and the whole packed 

 in a polished mahogany case. Price, $70.00. 



Improved Achromatic Microscope. (Fig. 756, next page.) 

 This figure represents one of the latest and most improv- 

 ed achromatic microscopes, uniting all the modern improve- 

 ments ; it being either a vertical microscope, according to 

 the usual style, or a horizontal one, having the improvements 

 of Prof. Amici. Attached to the instrument there is also a 

 camera lucida, by which an accurate drawing of any object 

 viewed in the microscope may be taken. The figure repre- 

 sents the instrument arranged as a horizontal microscope, 

 being the one most convenient for observation, as well as the 

 least fatiguing to the observer ; the instrument being placed 

 on the table about the height of the observer's eye. The 

 various adjustments to the instrument are of the most accu- 

 rate kind. There are two eye pieces of different powers, 

 six achromatic object glasses of different focuses, illuminator, 

 a camera lucida, a micrometer, objects, dissecting instru- 

 ments, <fec. The whole finished in the most superb manner ; 

 the box of polished mahogany having three drawers for con- 

 taining the various parts, into which they may be securely 

 packed. Price, $125.00 to $150.00. 



