204 



KINGSBURY'S DEMONSTRATION TABLE 



[CH. VI 



dence is put upon daylight. If artificial light is used regularly the 

 method here given is also applicable. 



The main points for this kind of demonstration were worked out 

 by Dr. B. F. Kingsbury for his laboratory of Histolog}' and Em- 

 bryology. 



FIG. 124 A, B. KINGSBURY'S DEMONSTRATION TABLE WITH ARTIFICIAL DAY- 

 LIGHT. (ABOUT ^ NATURAL SIZE). 



(From the Anatomical Record, June, 1916). 



T Top of the metal tube and the separable attachment plug. This tube 

 reaches about 2 meters above the floor so that the supply cable will be out of the 

 way. 



N S The single 250 watt mazda lamp with its metal support. 



i, 2, 3, 4, 5, 6, 7, 8 The shields (SH) with a disc of daylight glass (a) in each 

 at the level of the microscope mirror. 



A round top demonstration table of a size for 8 microscopes is 

 made and in the middle a single mazda lamp of 200 or 250 watts is in- 

 stalled (fig. 124 A). Around this lamp are 8 shields, each containing 

 a piece of daylight glass. 



With this arrangement 8 microscopes can be used at once (fig. 

 1 24 B) and the light is sufficient to enable the student to use all powers 

 of the microscope up to the highest oil immersion. This method 

 of demonstration has already been in use during the entire college 

 year of 1915-1916 and has proved successful beyond expectation. 



