— 147 — 

 The table below gives a summary of the results of Rabak's experiments: 



Oil 



Gathering time 



Yield 



Ester- 

 Content 



Free 

 Alcohol 



Observations 



Peppermint 



Before flowering, 

 22. July 



0,23 °/o 



9,5 °/o 



31,0 °/o 





„ 



During flowering, 



0,20 



14,5 



23,6 



Calc. as menthol or as 





21. August 









or as menthyl acetate 



>t 



After flowering, 



0,10 



24,0 



34,0 







25. September 











tt 



August 



1,50*) 



10,5 



48 



From green herb 



„ 



December 



0,55 



18,0 



47 



From dry herb 



Bergamot mint 



Before flowering, 



0,32 



47,6 



7,3 





(Mentha citrata) 

 tt 



20. July 

 During flowering, 

 22. September 



0,37 



55,0 



7,3 



Calc. as linalool or as 

 linalyl acetate 



tt 



After flowering, 



0,22 



52,0 



5,5 





tt 



September 



1,30!) 



33,0 



45 



From green herb 



„ 



December 



0,75 



51,8 



43 



From dry herb 



Wormwood 



Before flowering, 

 2. July 



0,19 



26,0 



14,7 





tt 



During flowering 



0,18 



32,5 



11,7 



Calc. as thujyl alcohol or 





14. July 









as thujyl acetate 



„ 



After flowering, 



0,18 



47,5 



12,0 







4. August 











tt 



August 



0,60!) 



32 



41 



From green herb 



tt 



December 



0,44 



35 



18 



From dry herb 



Rabak further passes in review the oil-yielding plants which grow wild 

 or are cultivated in the United States. We have already dealt with the 

 particulars of this review under the separate essential oils in the preceding 

 section of this Report. 



W. Mitlacher 2 ) has published a report on the experiments in the 

 cultivation of medicinal plants at Korneuburg which were instituted in the 

 year 1910 by the Committee for the Promotion of the Culture of Medicinal 

 Plants in Austria. The year 1910 having been the inaugural year of the 

 experiments, only preliminary results can be given, but it is to be expected 

 that in the future these experiments, which are of such great importance 

 from an agricultural standpoint, will produce interesting information. The 

 following oil-yielding plants have been grown: — 



Angelica Archangelica, Artemisia vulgaris (Mugwort), Cheiranthus Cheiri 

 (Wallflower), Hyssopus officinalis (Hyssop), Levistica officinalis (Lovage), 

 Majorana officinalis (Marjoram), Matricaria Chamomilla (Common Chamomile), 

 Melissa officinalis (Balm), Mentha crispa (Spearmint), Mentha piperita 

 (Peppermint), Ocimum Basilicum ) Pimpinella Anisum (Anise), Ruta graveolens 



2 ) This yield is calc. as dry herb. 



2 ) Zeitschr. f. d. landwirtsch. Versuchswesen in Osterreich, 1911. 



10* 



