MUREAT AND HEATH S STUDENT S MICROSCOPE. 



63 



deserves notice on account of the simple and effective construc- 

 tion of the Object-holder with which its Stage is furnished. This 

 consists of a brass plate perforated with a large aperture, having 

 rounded ends that project considerably beyond the stage, to which 



Fig. 34. 



Murray and Heath's Student's Microscope, 

 it is held down by a pair of springs that bear against its under- 

 side ; and it is best moved by applying a hand to each of its pro- 

 jecting extremities, whereby living objects may be followed with 

 great facility.* It may be safely said that no cheap construction 



* This Object-holder, the original idea of which was suggested by that 

 of Mr. Pillischer, has been copied by Mr. How, who has been erroneously 

 credited with the invention of it. 



