X1X.J 



CONCRETE ASSOCIATION. 



265 



Gaseous 



Solid 



TABLE III. 

 HYDROCARBON SERIES. 



re H 4 

 i&H, 



ICsX 



Marsh Gas. 



Ethane. 



Propane. 



f 'G\ H^ Tetrane or Diethyl ... 

 C 5 H 12 Pentane 

 C 6 H 14 Hexane or Dipropyl... 



C 7 H 16 Heptane 



C 8 H 18 Octane 



C 9 H 20 Nonane 



C 10 H 22 Decane 



C U H 24 Endecane 



C 12 H 26 Dodecane or Dihexyl. 



C 13 H 28 Tridecane 



C 14 H 30 Tetradecane 



, C 15 H 32 Pentadecane 



p TT (Hexdecane or Di- 

 ^16^34 j octyl 



Boiling 

 point. 



Specific 

 gravity. 



There is no break in the general line of increase, and after we 

 have gone through the gaseous stage, which stops at C 3 H 8 , and 

 through the liquid stage, which stops at C 15 H 32 , we get the 

 solid state, and there again the same series is represented. 

 So that I think one is justified in saying that, dealing with 

 this one simple case (and the only reason why I have taken 

 it is that it is a line which has been thoroughly worked out 

 by organic chemists), we are justified in saying that if 

 nature, in the regions which we cannot get at, works in the 

 same way as she does in the regions which we can get at, 

 the view is not absurd, and in fact any one who wishes to 

 dispute it in such a case as this has, I think, the onus probandi 

 thrown upon him. He must show that either in a certain 

 latitude or longitude, or at a certain temperature, or under some 

 unknown condition the laws of nature are absolutely changed, 

 and give place to new ones. That has not yet been found in 

 any other region of natural philosophy. Indeed I think one 



