MURRAY AND HEATH'S MICROSCOPE. 103 



one. The objectives furnished with this microscope are a 

 i inch of 75 angular aperture, and a 1 inch of 15, both 

 of excellent quality. A binocular body, with fine adjust- 



Fig. 57. Murray and Heath's 51. 5s. Students Microscope. 



ment, is added for a small additional sum, and the instru- 

 ment then becomes all the student can desire. 



Murray and Heath's Class Microscope, represented in 

 fig. 58, is especially intended for the use of teachers in 

 the demonstration of objects to a class of students. It is 

 but too well known to those who are engaged in teaching 

 how liable the objects exhibited, and sometimes even the 

 object-glass itself, are to be injured in the hands of those 



