256 Dr. E. Schunck on the Substances discovered in 

 given for the former the formula C 32 H 16 14 , and for the latter 



Qm h 18 o 15 . 



They consist in 100 parts of — 



Carbon . 



Hydrogen 



Oxygen 



Now if these two acids are distinct, they are certainly iso- 

 meric, since the differences in the preceding analyses are not 

 sufficiently great to justify the establishment of distinct for- 

 mulae. 1 propose for these acids, therefore, the formula 

 Cg4 H 18 14 . The calculated composition will then be as fol- 

 lows : — 



34 eqs. Carbon . . 



18 ... Hydrogen , 



14 ... Oxygen . . 



4174-6 100-00 



If this be the true composition of orsellic acid, orsellate of 

 baryta must be C g4 H 18 14 +BaO, and must have the follow- 

 ing composition : — 



Alpha-orsellate. 

 Stenhouse. 



5131*4 100-00 100*00 100*00 100*00 



Assuming, then, that the above formula is the correct one, 

 it follows that — 



if from 1 eq. orsellic acid . . =C 34 H, 8 14 

 we subtract 1 eq. lecanoric acid =C 18 H 8 8 



Ci6 Hj 6 



and add 1 eq. water . . . . = HO 



we obtain 1 eq. crystallized orcine =C l6 H H 7 



According to this view, then, orsellic acid is a coupled acid, 

 consisting of orcine and lecanoric acid ; or it is orcine-leca- 

 noric acid, just as erythric acid is erypicrine-lecanoric acid. 

 It is therefore obvious how the formation of lecanoric aether 





