APPENDIX A. 231 



The other bulb may be warmed either by boiling 

 liquid or by fire. 



Water, alcohol, steam, ether, mercury, acetic 

 acid, sulphide of carbon. 



The operation may be repeated and add the results. 



Experiments to le made on Oases and Vapors. 



To measure the temperature acquired by the air 

 introduced into a vacuum or space containing pre- 

 viously rarefied air. 



If the vacuum is made under the glass receiver 

 of an air-pump, and the cock admitting the outer 

 air be t suddenly opened, the introduction of this 

 air will cause a Breguet thermometer to rise to 50 

 or 60. To examine the movement of this 

 thermometer when the reintroduction 

 takes place only by degrees, to compare 

 it with the movement of the manometer. 



Construction of a manometer which 15 ] 

 may give the pressure almost instanta- 

 neously. 



Imagine a capillary tube bent into a 

 spiral at one end, and having one ex- 

 tremity closed, the other open. This 

 tube will be perfectly dry and a small 

 index of mercury may be introduced 

 into it. The diameter of the tube will be small 



