The Limonene Group of Terpenes. 
855 
43 Annalen, Bd. 239, p. 13. 
44 Ibibem, p. 24. 
45 Ibidem, p. 3. 
46 Ibidem, Bd. 57, p. 247. 
47 Ibidem, Bd. 225, p. 302. 
48 Ibidem, Bd. 230, p. 249. 
49 Ibidem, p. 265. 
50 Ibidem, Bd. 239, p. 14 and Bd. 252, p. 128. 
51 Ibidem, Bd. 230, p. 249. 
ad Terpinhydrate. 
1 According to Gmelin “ Hand-book of Chemistry” 1860, vol. 14, p. 258. 
2 Repert. 9, 276, and 22, 419. 
3 N. Journ. d. Ph., Bd. 15, St. 2, p. 46. 
4 Jahresbericht 27, p. 440. 
5 Annalen, Bd. 67, p. 362. List distinguishes between “ Krystallisirtes 
Terpin C 20 H 17 0 + 3 H + 2 aq.,” and “Terpin ohne Krystallwasser ? 
C 20 H 17 0 + 3 H,” p. 375. 
6 Annalen, Bd. 6, p. 267. 
7 Ibidem, Bd. 7, p. 167. 
8 Ididem, Bd. 33, p. 358. 
9 Ibidem, Bd. 52, p. 390. 
List 5 rejects this term because according to his views the elements of 
water in the terpin are not present as “ Hydratwasser.” He also rejects 
the term “ Terpentin campher ” as inappropriate. He accepts the no¬ 
menclature of Bezilius 4-5 : 
10 Ann. Chim. Phys. [3] T. 27, p. 80. (Annalen, Bd. 71, p. 348.) 
11 Annalen, Bd. 230, p. 247. 
12 Ann. Chim. Phys., T. 57, p. 334 (1835). (Annalen, Bd. 14, p. 75. 
The analyses of Dumas and Peligot pertain to crystals found in tur¬ 
pentine oil (a), in basil icum oil (Acimum basilicum, L) ( b ) and in carda¬ 
mom oil] (cardamomum minus) (c). They assign to these substances the 
formula C 40 H 33 + H 12 0 6 and believe them to be identical. No doubt 
these crystals were terpin hydrate as also those obtained by Rammels- 
berg (Annalen, Bd. 52, p. 391.) from a mixture of turpentine oil, hydro¬ 
chloric acid, “ Spiritus cochleariae ” and “ Spiritus Serpylli.” 
13 Blanchet and Sell mention Buchner, 2 Boisonot, Persot, Cluzel and 
Geiger (Mag. Pharm. 16, 64), as chemists who have investigated “Terpen_ 
thin campher.” B. & S. had not prepared the substance themselves but 
had recived it from Prof. Geiger who probably obtained it by heating 
moist turpentine oil for some time at a temperature of 50°. Based upon 
their analysis of the (“ nicht vollkommen von anhangendem Oele 
