66 



Orange oil, sweet 



Jamaica 



Italy- 



Orange oil, bitter 



Jamaica 



Italy 



... I 

 ... j 



op of the first io°/ I 

 Residue of evaporation 



aD20° 



0,8481 

 0,8488 



'47 



°2 



+ 97 { 

 + 98 



+ 97° 4' 

 + 96°54 



1,4%; m% 



0,848 



to 0,853 



+ 95° 

 to + q8° 



not, or only 

 slightly, lower 



2 to 4% 



0,8517 

 0,8521 



+ 96 20' 

 + 96°58' 

 + 96° 40' 



+ 95° 53' 

 2.6%; 3-2% 



0,853 

 to 0,857 



+ 90° 

 to + 93° 



slightly higher 



3 to 5% 



P. Bohrisch 1 ) in a paper on phosphorated oil, discusses among 

 other matters what substances are best suited for preserving this oil, 

 and among these he mentions limonene, which was first recommended 

 for this purpose by Schweissinger. 2 ) Bohrisch has discovered that 

 only limonene manufactured from sweet oil of orange has a conserving 

 action upon phosphorated oil, and that limonene from caraway oil is 

 of no effect. From these experimental results it appears to us to be 

 evident that limonene possesses no deoxidizing power whatsoever, as 

 otherwise it would be inexplicable why limonene from oranges should 

 behave altogether differently from limonene from caraway, with which 

 it is identical. Our opinion is that the conserving power of limonene 

 from oranges, as shown in the results obtained by Bohrisch, is due to 

 bodies which were present in the commercial article as impurities. 



The statement of Bohrisch that limonene is almost insoluble in 

 paraffin oil is incorrect; on the contrary, limonene is soluble in this 

 oil in every proportion, and if any turbidity occurs it is due to the 

 small proportion of water in the limonene and disappears again very 

 quickly when the solution is shaken up with anhydrous sulphate 

 of sodium. 



For the determination of the citral - content in oil of lemon, see 

 Analytical Notes. 



Eucalyptus Oils. Business in all commercial varieties was 

 exceedingly quiet and the transactions have not exceeded the ordinary 

 limits of consumption. Supplies of Globulus oil were abundantly offered, 

 and the ordinary qualities containing phellandrene, which are included 

 in our lists under the general description of "Australian Eucalyptus 

 oil" occasionally accumulated heavily. This variety, however, owing 

 to its powerful aromatic odour, is rather suitable for the manufacture 



*) Pharm. Zentralh. 50 (1909), 618. 

 2 ) Ibidem 43 (1902), 259. 



