ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



353 



f ormer, is a stage focusser, and has a concave mirror, 

 and the eye-piece are of a much later date. 



Both the objective 



Fig. 66. 



Pillischer's " Lenticular Microscope." — Mr. J. Pillischer, of Bona 

 Street, has most kindly presented this very interesting portable, really 

 pocket, Microscope to the Society's Cabinet. It was designed by the late 

 Mr. M. Pillischer, the donor's uncle. 



The instrument is figured and described in Urinary Deposits by 

 Golding Bird (p. 29, fig. 13, 1857, 5th ed.), but it will be noticed that 

 the figure differs slightly from the original, inasmuch as a second spring 

 to hold the slide has been added, and a semicircular segment cut out at 

 both ends instead of at one end of the base-plate as there shown. 



The design of this instrument (fig. 67) is most ingenious : there is 

 neither stand nor limb, the main basis of the instrument being the slide- 

 holder, at one angle of which is a short pillar containing a direct-acting 

 screw fine adjustment, which acts upon a swinging arm carrying the lens. 

 Below the stage is a mirror attached to a jointed arm, and a wheel of 

 diaphragms. The lenses, three in number, are Coddingtons of \, *£$, and 

 Jg-in. foci. 



