(>0 Modern Microscjpy. 



found working with a reading-lamp or an ordinary oil- 

 lamp, but no goodjjwork can ever be done by this means. 

 There are two or three important points which must be 

 borne in mind. In the first place, if light is proceeding 

 from the one illuminating point only, and the remainder 

 of the room is dark, while using the microscope, a great 

 deal better effect can be produced than if the whole room 



FIG. 21. Microscope Lamp with Metal Chimney. 



be illuminated. In the next place, a small brilliant 

 source of light is far better than a large one. In recent 

 years special attention has been paid to this matter, with 

 the result that lamps have been constructed with which 

 the best work may be accomplished. The following are 

 essentials: The reservoir for oil should be flat and large 

 in diameter, so that the light may be brought down very 



