( 248 ) 



with regard to valerian acid and scatol 



isoamylacetaat j 



terpineol with regaid to nun en £ rid Ecakl 



guajacol I 



nitrobenzol 1 



terpineol with regard to aethylbisulfide and scatol 



guajacol 

 muscon ] 



valerian acid with regard to isoamylacetate and terpineol 

 scatol 



aethylbisulfide i 



valerian acid ' with regard to nitrobenzol and terpineol 

 scatol ) 



Even a coincidence of 4 vectors, has been found once, and that for 

 isoamylacetate 

 nitrobenzol 

 terpineol 

 guajacol 



The planes in which the vectors of odourlessness, belonging to these 

 odours, meet, have the form of a cone, respectively with the vector 

 of valerian acid and that of scatol for their axis. 



If we cast a glance at the sum of the results arrived at, it 

 is especially the coincidence of several vectors at the same time 

 which draws our attention : 4 vectors with regard to valerian acid and 

 scatol, 4 sets of 3 vectors each time with regard to two others. 

 Evidently there exists between the coinciding vectors agreement in 

 action on our consciousness for those definite cases. But some of the 

 coinciding vectors are repeatedly found together. Their mutual agree- 

 ment must therefore be of a more intimate nature, otherwise it could 

 not reveal itself so frequently and in so many different circumstances. 

 This closer connection exists e.g. between isoamylacetate and nitro- 

 benzol, which in no less than 4 cases become reciprocally identical 

 to 1" „ of the circumference of the circle; a connection only a little less 

 close between nitrobenzol and terpineol, nitrobenzol and guajacol and 

 isamylacetate and guajacol, which do the same in 3 cases ; a connec- 

 tion not quite wanting between isoamylacetate and terpineol and 

 terpineol and guajacol, where also these appear to coincide to 1%- 



But also the vectors with regard to which the coincidence of 



