1844.] of Bodies generally existing as Gases. 



107 



cement, but leaves it when the pressure is diminished. The 

 following are certain pressures and temperatures, which, I 

 believe, are not very far from truth ; the marked numbers are 

 from experiment. 



The result formerly obtained * was forty atmospheres at the 

 temperature of 50 Fahr. 



Sulphurous Acid. When liquid, it dissolves bitumen. It 

 becomes a crystalline, transparent, colourless, solid body at 

 105 Fahr. ; when partly frozen the crystals are well formed. 

 The solid sulphurous acid is heavier than the liquid, and sinks 

 freely in it. The following is a Table of pressures in atmo- 

 spheres of 30 inches mercury, of which the marked results are 

 from many observations, the others are interpolated. They 

 differ considerably from the results obtained by Bunsen f, but 

 agree with my first and only result. 



Fahr. 

 o 







10 



^26 

 31-5 



Fahr. 



76-8 



85 

 90 

 93 

 98 



Atmospheres. Fahr. Atmospheres. 



0-725 40 . . 1-78 



0-92 46-5 . . 2-00 



1-00 v48 . . 2-06 



1-12 ^56 . . 2-42 



1-23 58 .. 2-50 



1-33 ^64 . . 2-76 



1-50 68 . . 3-00 104 



1-53 w73-5 . . 3-28 110 

 1-57 



Sulphuretted Hydrogen. This substance solidifies at 



* Philosophical Transactions, 1823, p. 198; or p. 95. 

 t Bibliotheque Universelle, 1839, xxiii. p. 185. 



Atmospheres . 



, 3-50 

 , 4-00 



435 



4-50 



5-00 



5-16 



5-50 



6-00 



