1893.] 



MICROSCOPICAL JOURNAL. 



175 



shaped holder in Imii carries thi- oil reservoir, and attached to 

 this is the shade caiiyin«j the hull's-eve lens. Tiiis is a finely 

 ijiouikI and polished lens, which. l)ein<4 accuratelv focused upon 



The Acme Microscope Lamp. 



a flame of moderate size, gives a light sufficient for the highest 

 powers, with verv little heat. 



For whitening this light there is a disc of blue-tinted glass, D, 

 which is held back of the bull's-eye lens by a small ring ; and for 

 softening the light, when used with low power, a ground glass, 



