642 



SCIENCE 



[N. S. Vol. XXXVIII. No. 983 



L. V. Redman, A. J. Weith and F. P. Brock: 

 The Rate of Beaction Between Bexamethylene- 

 tetramine and Phenol. 

 The rate of reaction before the insoluble stage 



is reached is followed by measuring the ammonia 



evolved. Intermediate products are formed. 



Amino-saligeno-saligeninj 



NH,-CH, 





\/ 

 was isolated and identified. 



The rate of transformation into the insoluble 

 stage is followed by separating the resin into (1) 

 alkali insoluble, (2) alkali soluble and acid insolu- 

 ble, (3) alkali, acid and water soluble. 

 Treat B. Johnson: Chairman's Address. The 



Practical Utility of Einsherg's Beaotion. 



Edwin F. Hicks: An Anomalous Reaction of Re- 



sorcinol. 

 F. B. Allan and C. R. Rubidge: The Action of 



Phthalic Anhydride on Benzene in Presence of 



Aluminium Chloride. 

 F. B. Allan and H. C. Mabtin : o-Benzoyl-Benzoyl 



Chloride and o-Benzoyl-Benzoyl Cyanide. 

 A. W. Schorger: The Oleoresins of Jeffrey and 



Singleleaf Pines. 



The oleoresin of singleleaf pine (P. monophylla) 

 contains 19.00 per cent, of volatile oil; 79.63 per 

 cent, colophony; trash 0.11 per cent.; water 1.26 

 per cent. The volatile oU, di,o 0.8721-.8733, 

 aD26o + 14.41° to + 17.26° contains 80-8.5 per cent, 

 d-a-pinene; 4-5 per cent. I- or i-limonene, 4-6 per 

 cent, d-cadinene; losses 4.5 per cent. The colo- 

 phony contains 7.22 per cent, resene and resin 

 acids isom>eric with abiotic acid. 



The oleoresin of JefErey pine (P. Jeffreyi) has 

 an average content of 9.96 per cent, volatile oil, 

 87.88 per cent, colophony, 1.69 per cent, water and 

 0.47 per cent, trash. The volatile oU, di^o .6951- 

 .7110, contains about 95 per cent, n-heptane and 

 5 per cent, of an aldehyde apparently citronellal. 

 The colophony contains 12.5 per cent, resene and 

 resin acids isomeric with abietic acid. 



A. W. Schorger: The Leaf Oil of Douglas Fir. 

 The oils distilled from the Douglas fir {Pseudo- 

 tsuga taxifolia) in California had: dy^o .8727- 

 .8779; OD20O — 17.02° to — 22.17°; ester No. after 

 aoetylation 27.50-51.78; they contained: 1-a-pinene 

 25 per cent.; l-/3-pinene 48 per cent.; i- or Uimo- 

 nene 6 per cent.; furfurol; bornyl acetate 6.1 per 

 cent. ; free alcohol as borneol 6.5 per cent. ; ' ' green 



oU " 3 per cent.; losses by polymerization, etc., 

 5 per cent. 



William J. Hale: The Condensation of Thiourea 



with Acetylacetone. 

 Nellie Wakeman and Edward Keemers: The 



Water and Volatile Oil Content of the Leaves of 



Monarda fistulosa. 



Although the oil of Monarda fistulosa had been 

 distilled frequently, no systematic study of the 

 exact oil content of the plant has been made thus 

 far. Inasmuch as the leaves contain by far the 

 largest portion of the oil that is obtained when 

 the flowering herb is distilled, these organs were 

 separated from the stems and distilled in the 

 fresh condition. In order that the percentage 

 might be computed with reference to the dry 

 material, moisture determinations were also made. 

 Since the oil content of the dried leaves is not 

 inappreciable, the moisture determinations were 

 made by the xylene method. The series of experi- 

 ments here referred to were made during the 

 spring and summer of 1911. The early material 

 was obtained from wild plants, the later material 

 from the medicinal herb garden, a cooperative 

 experiment between the Bureau of Plant Industry 

 and the University of Wisconsin. From the tabu- 

 lated data it became apparent that the oil content 

 increased with the advance of the season whether 

 computed for the fresh or dry herb. 



E. N. DoANE and Edward Kremeks: The Phys- 

 ical and Chemical Constants of a Number of 

 Monarda fistidosa Oil. 



Comparatively early in the study of the Monarda 

 oils efforts were made to ascertain the several 

 changes in the oil as expressed by the physical 

 constants and phenol content. In connection with 

 the cultivation of the wild bergamot in the medi- 

 cinal herb garden, a cooperative experiment be- 

 tween the Bureau of Plant Industry and the Uni- 

 versity of Wisconsin, at Madison, it seemed highly 

 desirable to ascertain what changes might be 

 noted in connection with the oils distilled each 

 year. For this purpose the chemical constants of 

 the dephenolated oil (acid number, saponification 

 number, saponification number after acetylation) 

 as well as the physical constants of the original 

 and dephenolated oils were ascertained. The con- 

 clusion arrived at thus far is that the metabolic 

 processes of the plant, so far as its volatile prod- 

 ucts are concerned, appear to be subject to but 

 slight changes in different years. 



Charles L. Parsons 

 (To he continued.) 



