CH. IlJ ARTIFICIAL LIGHT FOR THE MICROSCOPE 55 



This lamp illumination is brilliant, but the color values are quite 

 unlike those given by daylight. 



97. Lighting with artificial daylight. For the source of light 

 use preferably a 75-or loo-watt nitrogen-filled mazda lamp enclosed 



FIG. 38. LABORATORY TABLE, STOOL, MICROSCOPE AND CHALET LAMP WITH 



DAYLIGHT GLASS. 



(About one fifteenth natural size.) 



CL Chalet microscope lamp with two windows of daylight glass on opposite 

 sides under the overhanging roof. The roof serves to protect the eyes (fig. 37). 



M Laboratory microscope, slightly inclined. 



It will be noted that the table rail is cut out in front to avoid interference with 

 the knees of the observer. A table drawer at the right can be pulled out without 

 moving. The revolving piano stool can be adjusted to any desired height. 



in a kind of lantern (figs. 37-38). Have the lamp filament at about 

 the level of the center of the microscope mirror, and a frosted disc 

 of daylight glass, before an aperture in the lantern. The aperture 

 for the daylight glass should be from 5 to 10 cm. in diameter. For 

 all high powers the small size is sufficient. For objectives of 50 to 



