496 



SUMMARY OF CURRENT RESEARCHES HELATING TO 



exceedingly satisfactory, being very convenient and maintaining a uniform 

 temperature (figs. 48, 49). 



The apparatus is simply a glass flask about one decimetre in diameter 

 heated by vaporized chloroform. The neck of the flask is a slender 



X 



F IG . 49. — Cross section of paraffin bath shown in 

 fig. 48. The shaded portion below near the 

 electric lamp shows the chloroform ; that in 

 the cup above indicates the paraffin. 



Fig. 48.— The new paraffin 

 bath in operation. 



tube nearly a metre long, which ends above in a thistle tube-funnel for 

 convenience in introducing the regulating fluid. A small quantity of 

 chloroform is poured into the flask through the long neck. The heat 

 from a sixteen candle-power electric bulb fills the flask with the vapour 



