Astronomical Phenomena. 



89 



Art. VII. Oil the Boiling Points of Saturated Solutions. 

 By T. Griffiths. 



To examine and determine the boiling points of saturated solutions, 

 and the quantity of salt dissolved at their respective temperatures, 

 with the view, if possible, of furnishing a useful and interesting 

 table, has been the object of the present series of experiments. 



Of the great number of saline bodies, the most important only 

 have been selected ; and of them perhaps comparatively few, many 

 others being so exceedingly soluble, and changing their composi- 

 tion by the application of heat, that they have necessarily been 

 excluded from these experiments The method adopted in ascer- 

 taining the temperature consisted in exposing water with great 

 excess of salt, in barrel-shaped porcelain vessels to the heat of an 

 argand lamp, a thermometer being exactly placed in the centre of 

 the liquid. When the solution was in full ebullition, the degree 

 indicated by the thermometer was carefully taken, the barometer 

 on the days the experiments were made, being at 30 inches. 



In the following Table the first column contains the name of the 



