1206 



to find another for a long time. We think we have found a metiiod 

 that enables us to find the coniposilion of the gas-hydrates with 

 great certainty, of which the description follows below. 



3. In order to make the principle on which this analysis rests, as 

 clear as possible, we will imagine a binary system, of which the 

 first component (A) is gaseous in a definite temperature range, the 

 second (B) is in the neighbourhood of its melting-point under the 

 same circumstances and not perceptibly volatile. On increase of 

 pressure a solid compound can form froui the gaseous first and the 

 solid second component. In the melted second component the gas is 

 soluble neither as such nor as compound. Then the P-T projection 

 of the spacial figure is lepresented by figure 1. Hence the first 

 component A appears in these equilibria in free state as a gas (G) 

 and bound in the compound (S). The second component B occurs 

 free as solid (S/i) and liquid (L), bound to the first component in the 

 compound (S). 



The three-phase lines S/jLG and SSbI^ coincide with the melting- 

 point line of />. The transformation is namely indicated by Sb"^ L 

 on both three-phase lines, and is the same as on the melting-point 

 line of pure B. The triple-point of B (point B in fig. 1) lies near 



B T 



Fig. 1. 

 the 7-axis ; the sublimation - and the boiling-point line of B practically 

 coincide with the 7'-axis. 



When we indicate the compound by AB„, the transformations on 

 the two other three-phase lines are indicated by : 



AB„ -^ A + 7iB — E, (on 5 Sn G) 



{solid) igcs) {solid) 



ABn -^A^ nB—E^ (on 5 L G). 



[solid) [ft (is) (li'/uid, 



Hence the diff'erence between the two transformation energies E^ 



