LABORATORY MANUAL 



HEAT 

 EXPERIMENT 1. THE THERMOMETER 



FILL a glass tube shaped as in Figure I to the point A 

 with mercury, and place, the bulb of the tube in a beaker 

 of boiling water which is supported on a tripod 

 over a Bunsen flame (Fig. 2). Hold the bulb in 

 the water for three or four 

 minutes, and watch the mer- 

 cury carefully, noting whether 

 it rises or falls in the tube or 

 remains stationary. At the 

 end of several minutes note 

 the position of the top of the 

 mercury and mark the posi- 

 tion on the tube by means of 

 an ink spot. 



Remove the bulb of mer- 

 cury from the boiling water, 

 and after allowing it to cool 

 for a few minutes, put it into 

 a beaker of chopped ice (Fig. FIG. 2. Determining 



,1 the upper point on a 



3); again watch the mer- therm ometer. 

 FIG. i. cur y in the tube, noting 

 Making a whether it rises or falls. At the end of several 



thermom- 

 eter, minutes note the position of the top of the mer- 



9 



