— n5 — 



odour is just that property which in text-books, like in publications 

 in general, is described least correctly, partly because it does not lend 

 itself well to a description, and partly because the description is 

 frequently based on old and unreliable statements. The data on the 

 smell in the tables are of a very general character and are not 

 particularly suitable for giving a clear conception of the degree of 

 influence. It would not be devoid of interest to examine systemat- 

 ically, with definite examples which might perhaps be taken from 

 the terpene series, what influence is exerted by the entry of double 

 linkings, or by their saturation, by the substitution of sulphur, the 

 addition of phenyl-rests, etc. not only on the odour generally, but 

 particularly on its degree of intensity. The numerous easily accessible 

 and well-studied derivatives of the carvone and the camphor series 

 would be specially suitable for this purpose. 



Owing to the close relationship between the bornyl and the fenchyl 

 derivatives, which belong to the pentaceangroup, I. Kondakow 1 ) 

 proposes for these compounds the introduction of a nomenclature which 

 makes the relationship of these bodies as methylated derivatives of 

 bicycloheptane easily understood. According to this, nor-camphane would 

 be dimethyl-7, 7 -bicycloheptane; camphane = o-trimethyl- 1, 7, 7-bicyclo- 

 heptane; dihydrofenchane = m-trimethyl- 2, 7, 7 -bicycloheptane; nor-iso- 

 camphane = dimethyl - 6, 6 -bicycloheptane. From the last-named hydro- 

 carbon are derived 2 ortho-, 2 meta- and 1 para-derivative, viz., 

 o-trimethyl- 1, 2, 2 -bicycloheptane and isocamphane = o-trimethyl- 2, 2,- 

 3 - bicycloheptane = 0-2,2- dimethyl - m - 3 - methylbicy cloheptane ; f en- 

 chane = m-trimethyl- 2, 2^ 4 -bicycloheptane; m - trimethyl-2, 2, 6-bicyclo- 

 heptane ; isof enchane = p - trimethyl -2,2,5- bicycloheptane. All methyl- 

 ated ortho-, meta- and para-derivatives can be explained by the formula 



of bicycloheptane: — 



C H 



CH 



We reported already last year 2 ) on Harries' ozonides of terpene 

 compounds, and we now add to what we then said a short note 

 regarding an ozonide, the production of which was described by Harries 

 and Weil in a work 3 ) published some time ago. This is the ozonide 

 of an unsaturated cyclic hydrocarbon 1, 1, 3-trimethylcyclohexene-3 



*) Journ. f. prakt. Chem. II. 74 (1906), 420. 



2 ) Report April 1906, 98. 



:i ) Berl. Berichte 37 (1904), 845. 



8* 



