JOURN. R. MICR. SOC. 1905. PI. VII 



Fig. 84. 



A. Points to the paraffin bath brazed to the stage, into which dips the 



bent end of the silver heat-eondueting rod. 



B. The thermometer. 



C. The manometer, with its glass tap on the limb (nearer the observer), 



and its open limb, over which hangs the iron float (further from 

 the observer). 



D. The spring safety cock attached to the gas supply of the Bunsen 



burner. 



E. The adjustable weight at the distal end of the beam. 



f lo lac p. 420. 



