596 



1. The truxillic acids for which 3 large atom groups are situated 

 on one side of the ring are converted through heating with KOH 

 or HOI to truxillic acids with 2 heavy atom groups on one side. 



2. By melting willi KOH those forms arise for which the heavy 

 atom groups are situated alternately on one side or on the other 

 of the ring. 



3. The truxillic acids for which 2 heavy atom groups are placed 

 on one side of the ring are not changed into another truxillic acid 

 through heating with hydrochloric acid. 



In the foregoing exposition it has been assumed that the truxillic 

 acids possess a tetramethylene ring. The proof for this has not yet 

 been furnished; their properties found up to now can very well be 

 reconciled with this conception. 



I hope shortly to be able lo communicate the results of an in- 

 vestigation in this direction. 



