730 Wisconsin Academy of Sciences, Arts, and Letters. 
Western red cedar ( Thuja plicata Don.) 6 
Red juniper ( Juniperus Virginia Linn.) 7 
Douglas fir ( Pseudotsuga taxifolia Britt.) 8 
Oloresins 
Amabilis fir (Abies amaUlis Forb.) 9 
Balsam fir (Abies balsamea Mill.) 10 
Douglas fir (Pseudotsuga taxifolia Britt.) 11 
Norway pine (Pinus resinosa Ait.) 12 
Cuban pine (Pinus heterophylla Sud.) 13 
Longleaf pine (Pinus palustris Mill.) 14 
Pond pine (Pinus serotina Mich.) 15 
Shortleaf pine (Pinus echinata Mill.) 16 
Loblolly pine (Pinus taeda Linn.) 16 
Digger pine (Pinus sabiniana Dougl.) 17 
Jeffrey pine (Pinus Jeffreyi ). 18 
6 Rose and Livingston, Jour. Am. Chem. Soc. 34 (1912) 201; Blasdale, 
Jour. Am. Chem. Soc. 29 (1907) 539; Brandel and Dewey, Pharm. Rev. 26 
(1908) 248; Schimmel & Co. Report, April (1909) 89. 
7 Schimmel & Co., Ber. April (1894) 56; April (1898) 13; Hanson & Bab¬ 
cock, loc. cit. 
8 Brandel and Sweet, Pharm. Rev. 26 (1908) 326. 
9 Rabak, Pharm. Rev. 46 (1905) 23. 
10 Tschirch and Briining, ( Abies canadansis). Arch. d. Pharm. 238 (1900) 
487 ; Emmerich, Am. Jour. Pharm. 67 (1895) 135. 
n Blasdale, Jour. Am. Chem. Soc. 23 (1901) 162; Frankforter, Jour. Am. 
Chem. Soc. 28 (1906) 1467; Rabak, Pharm. Rev. 22 (1904) 293. 
12 Frankforter, Jour. Am. Chem, Soc. 28 (1906) 1467; Ibid. 31 (1909) 561. 
13 Herty, Jour. Am. Chem. Soc. 30 (1908) 863; Kremers, Pharm. Rundsch, 
13 (1895) i35 ; Long, J. Anal, and Appl. Chem. 6 (1891) 1; 7 (1893) 99. 
14 Kremers, Pharm. Rund. 13 (1895) 135; Pharm. Rev. 15 (1897) 7; Long, 
Jour. Am. Chem. Soc. 16 (1894) 844; 21 (1899) 637 ; Jour. Anal, and Appl. 
Chem. 6 (1891) 1; Semmler, Ber. 33 (1900) 1455; Ahlstrom and Aschan, 
Ber. 39 (1906) 1441; Barbier and Hilt, Compt. Rend. 108 (1889) 519; Herty, 
Jour. Am. Chem. Soc. 30 (1908) 863; Herty and Dickson, Jour. Ind. Eng. 
Chem. 4 (1912) 495; Tschirch and Koritschoner, Arch. d. Pharm., 240 
(1902) 568. 
15 Herty and Dickson, Jour. Am. Chem. Soc. (1908) 872. 
16 Herty and Stern, Science, 27 (1908) 327. 
17 Wenzell, Am. Jour. Pharm. 44 (1872) 97; Pharm. Rev. 22 (1904) 408; 
Thorpe, Jour. Chem. So:c. 35 (1879) 296; Samuels, Pharm. Rec. 8 (1888) 
39; Blasdale, Jour. Am. Chem. Soc. 23 (1901) 162; Kremers Pharm. Rev. 
18 (1900) 165; Rabak, Pharm. Rev. 25 (1907) 212; for additional references 
see Bull. 119, U. S. Forest Service, p. 21. 
18 Wenzell, Pharm. Rev. 22 (1904) 408; Blasdale, Jour. Am. Chem. Soc. 
23 (1901) 162; Leuchtenberger, Arch. d. Pharm. 245 (1907) 701. 
