— 79 — 



and Piper asperifolium Ruiz, et Pavon (this parcel had been described 

 by an American source as derived from Piper Mandoni) a yield of 

 0,8 °/ of oil was obtained. This oil possessed the following constants: 

 d 2 o° 1 1 10, «d -(- o° 24/, Md + o° 21,8', methoxyl- content 21,8 to 

 22,1 °/ , content of acids -)- phenols 1,5 %• 



Freed from acids and phenols, the oil, on being distilled in vacuo, 

 gave the following fractions: — methoxyl-content 



I. B. p. 70 to 148 15 mm. 5 g. o % 

 II. „ 148 „ 153 15 mm. 11 g. 15,6% 



III. „ 153 „ 155° 15 mm. 35 g. 22,5% 



IV. „ 155 „ 158 15 mm. 43 g. 26,3% 

 Residue 2 g. 



In the first fraction, pinene was identified by the nitroso-chloride. 

 The second fraction boiled after repeated distillation over sodium 

 at 147 to 1 49° (12 mm.) and consisted principally of sesquiterpene. 

 In fraction III, after distillation over sodium, dill w<?- apiol (m. p. 44 

 to 45 ) was found present. The fourth fraction contained dill 

 apiol, identified as tri-bromo dill - apiol (m. p. no°). We also dis- 

 tilled similar leaves and placed the oil, as well as a sample of the 

 leaves themselves, at the disposal of Prof. Thorns 1 ). The leaves were 

 identical with those referred to above, except in this respect, that in 

 our sample the base of the leave was rounded on both sides, and 

 that the leaves were heart-shaped. Prof. C. de Candolle is of opinion 

 that these leaves represent the lower leaves of specimens of Piper 

 acutifolium Ruiz, et Pavon, var. subvert ascifolium, before flowering. 



The following constants were determined: d 2 o° 0,939, «d -|~o°24', 

 Md 4" o°2 5,5'. The oil contained 1 °/ of acids and phenols and a 

 very large proportion of sesquiterpenes. Its methoxyl-content was 4,2 °/ . 



The oil (200 g.) was split up into the following fractions: — 

 I. B. p. 50 to 150 80 mm. 50 g. 

 II. „ 130 „ 155 



III. „ 155 n 165 



IV. „ 165 „ 1 75 

 Residue 



Pinene was found to occur in fraction I and was identified by 

 the nitroso-chloride. Dill apiol, of which only traces were present, 

 was identified from the bromine derivative. 



For the botanical description of each separate species of leaves we 

 refer to the paper, as quoted above. 



Oil of Mentha arvensis var. glabrata. F. Rabak 2 ) has 

 distilled an essential oil from Mentha arvensis var, glabrata Gray. (N. O. 



*) Report April 1909, 70. 



2 ) The Midland Drugg. and Pharm. Review 43 (1909), 5. 



22 mm. 



100 g. 



22 mm. 



30 g. 



22 mm. 



7 g. 





4g. 



