CHAPTER II. 



THE MICROSCOPE USED AS A MAGIC LANTERN. 



Enlargements of minute objects may be shown 

 to audiences either by ordinary lantern slides or 

 through the projection microscope attached to an 

 optical lantern, neither of which, in all probability, 

 does the amateur possess ; yet absolutely no extra 

 apparatus is needed by the owner of a microscope 

 in order to show his slides to a small number of 

 persons at one and the same time, since the micro- 

 scope can readily be turned into a magic lantern 

 by using it in a horizontal position. 



In this way infusoria, diatoms, water fleas, and 

 the larger inhabitants of stagnant water can be 

 shown in motion, and very entertaining it is to 

 watch their movements over the screen. 



The brilliant and ever-changing colours of 

 polariscope objects can also be shown, though the 

 largest and most effective pictures are got from 

 stained sections of plants, insects, and similar slides. 



To those who care to make the experiment a 

 few hints may be of service. First get a sheet of 

 stout cardboard about I2in. square to act as a 

 screen, and place it in an upright position against 

 a few books piled up behind it. Now place the 



