— 43 — 



Silver-determination: 0,2253 gm. of the substance: 0,0885 gm. Ag. 

 Found: Calculated for C 10 H 15 AgO 2 : 



Ag 39> 2 9% 39» 2 7% 



The acid is capable of absorbing two atoms bromine, from which 

 the conclusion may be drawn that the acid molecule, and conse- 

 quently also the molecule of the aldehyde, shows a double-linking. 

 According to this, and in view of the high specific gravity, the assump- 

 tion is justified that the aldehyde is cyclic. 



The brominating was carried out in chloroform solution, with ice- 

 cooling. The reaction product crystallised from petroleum ether in 

 leaflets with a silky lustre, of the melting point 1 16 to 1 1 7 . A bromine- 

 determination proved that as a matter of fact 2 atoms bromine have 

 been attached. 



0,1830 gm. of the substance: 0,2104 g m - AgBr. 



Found: Calculated for C 10 H 16 Br 2 2 : 



Br 48,91% 48,78% 



Oxidation of the aldehyde with 3 per cent, permanganate solution 

 yielded as oxidation product a yellow syrup interspersed with minute 

 crystals. This product has not yet been examined. 



We are still occupied with the further examination of the alcohol 

 C 10 H 16 O and of the portions of the oil which have not yet been 

 dealt with. 



Gouft Oil. P. Jeancard and C. Satie 1 ) obtained from two 

 plants indigenous to Algeria, two new essential oils which they desig- 

 nated Essence de Gouft and Essence de Scheih. All parts of 

 the plant were used up in the distillation. 



The scheih oil had a brown -red colour and an odour like ab- 

 sinthe; the bright-yellow gouft oil reminded in the odour of turpen- 

 tine and mastic. 



The constants of gouft oil were as follows: 



^9,50 0,8720; «d — I 5° 2 ° / ; a cid number 1,12; ester number 14; 

 ester numbei after acetylation 42. The boiling point lay about 170 ; 

 the portions boiling below 170 appeared to contain pinene; melting 

 point of the nitrosochloride 103 . From the higher-boiling fractions 

 a few drops of an alcohol with a geraniol-like odour were isolated 

 with phthalic acid anhydride. 



Scheih oil had the following constants: 



^9,50 0,9540; acid number 8,4; ester number 66,5; ester number 

 after acetylation 129,5. This oil contained obout 15 % phenols, among 



*) Bull. Soc. chim. III. 31 (1904), 478. 



