MURRAY AND HEATH's STAND. 113 



flat, and the slide-rest moves smoothly and freely over 

 it. If the instrument is intended for use in the 

 laboratory, a glass stage is made to replace the brass 

 one. The objectives furnished with this microscope 



FIG. 65. Murray and Heath's Student's Microscope. 



are a -inch of 75 angular aperture, and a 1-inch of 

 15, both of excellent quality. 



Murray and Heath's Class Microscope, represented 

 in fig. 66, is especially intended for the use of teachers 

 in the demonstration of objects to a class of students. 

 The instrument consists of the usual microscope body 



i 



