70 



BACON. 



believe the following results will show that the ordinary analytical con- 

 stants are of very great assistance, as only the records of isolated constants 

 obtained on oils largely of unknown origin are available in the litera- 

 ture. Owing to this lack I have determined the simijle constants on a 

 number of oils of known origin. Most of the latter were from one dis- 

 tillery, the process of distillation being watched and the samjales col- 

 lected by myself. In this manner I was able to obtain a few analytical 

 constants on oils known to be of first or second grade ; the results recorded 

 present many regularities and are so promising that it is hoped, as more 

 material becomes available, to discover other constants, so that in time the 

 purchase and sale of ylang-ylang oil may be j^laced on an exact analytical 

 basis. In this first series the values determined were : Specific gravity 



at -7^ (pyknometer) ; optical rotation at 30'; refractive index, N^; 



and ester number, the latter by the usual method, using 1 gram of oil. 

 The results are tabulated as follows : 



Table II. — Tabulation of the constants of first-grade ylang-ylang oils. 



No. 



Sp. gr. 

 30° 



4° 



30° 

 ^ D 



-f 



Ester 

 num- 

 ber. 



Origin and remarks. 



1 



0.941 



—43. 6 





129. 7 



My distillation, Apr., 1907. First 0.45 per cent from 10 













kilos of good fiowers. 



2 



0.920 



—35.5 



1. 4846 



108 



B.'s distillate of Aug. 17, 1907. 



3 



0.911 



-39.3 



1.4840 



95 



First half of first-quality oil distilled Aug. 17, 1907. 



4 



0.921 



-35.1 



1.4821 



109 



B.'s distillate of Aug. 20, 1907. 



5 



0.939 



-34.2 



1.4880 



131 



B.'s distillate of Aug. 22, 1907. 



6 



0.920 



-38.9 



1.4838 



98 



B.'s distillate of Aug. 23. 1907. 



7 



0.925 



-45.2 



1. 4900 



110 



B.'s distillate of Aug. 24, 1907. Typhoons and poor 

 flowers. 



8 



0.919 



—45.9 



1.4864 



100 



B.'s distillate of Aug. 27, 1907. Rains and typhoons. 



9 



0.912 



-48.2 



1.4852 



90 



B.'s distillate of Aug. 29, 1907. Flowers very poor be- 

 cause of continued typhoons. 



10 



0.922 



-26.0 



1. 4794 



117 



First quality oil rectified invaeuo. B.'s distillate 90per 

 cent yield. 



11 



0.915 



—45.6 



1. 4843 



96 



B.'s distillate of Aug. 31, 1907. Flowers so poor because 

 of continued typhoons that 500 kilos were used for 1 

 kilo of oil. 



12 



0.913 



-38.3 



1. 4808 



95 



B.'s distillate of Sept. 5, 1907. Flowers good as a result 

 of three days' sunshine and hence a large yield of oil. 



13 



0.924 



—49.7 



1.4898 



104 



B.'s distillate of Sept. 7, 1907. 



14 



0.927 



—44.4 



1.4883 



112 



B.'s mixed distillate. 



15 



0.916 



—36.9 



1. 4811 



100 



B.'s distillate of Sept. 10, 1907. 



16 



0.915 



—33.2 



1. 4747 



102 



Distillate 55 grams obtained by redistilling 100 kilos of 

 ylang-ylang condensation water. 



17 



0.917 



—39.8 



1.4785 



96 



B.'s distillate of Sept. 12, 1907. 



18 



0.922 



45.9 



1. 4890 



104 



B.'s distillate of Sept. 3, 1907. 



19 



0.921 



-40.7 



1.4S25 



108 



B.'s mixed distillate. 



20 



0.914 



-37.9 



1.4895 



101 



First-quality oil from Mindoro. 



21 



0.949 



-36.1 



1. 4940 



138 



Distilled in vacuo with steam from selected flowers. 



22 



0.827 



—42.2 



1. 4912 



126 



B.'s distillate of Feb. 1, 1908, from very good flowers. 



23 



0.9.58 



—27.0 



1.4910 



169 



0.4 per cent yield from selected flowers with very care- 

 ful distillation. A very fine oil. 



