xv. 4 Oshima: Formosan Termites 369 



in the camphor green oil is less than 0.04. The presence of 

 the following has been proved : 



Ai-Menthenone-3 (melting point, 224° C). 



Cumic aldehyde semicarbazone (melting point, 210° C). 



An unknown semicarbazone (melting point, 218° C). 



Camphor and cineol. — As a result of the fractional distillation 

 it is proved that camphor green oil still contains camphor (8.1 

 per cent) . The presence of cineol and limonene is a well-known 

 fact. 



Safrol. — In the fractions distilled at comparatively low tem- 

 perature crystals of safrol are deposited. It is proved that the 

 oil contains about 30 per cent of safrol. 



Terpene alcohol. — It is possible to find linarol, garaneol, citro- 

 neol, terpineol, d-terpineol, and cumic alcohol. The presence of 

 these compounds has not been actually proved, because an im- 

 portant reagent, phenylisocyanate, was not at hand. 



Sesquiterpene and sesquiterpene alcohol. — It is proved by K. 

 Kafuku that camphor green oil contains about 10 per cent of 

 sesquiterpenes (cadinene, bisabolene, and sesquicamphene) and 

 25 per cent of sesquiterpene alcohol. He took three fractions 

 (115° to 120°, 120° to 130°, 130° to 140° C.) distilled under 

 reduced pressure (5 millimeters) and redistilled them, adding 

 metallic sodium. The refractive indices are given in Table XXV. 



Table XXV. — Refractive indices of the three fractions distilled under 



reduced pressure. 



Distilling point. Refractive index 



•C. at 18 °C. 



120 to 125 1.4980 



125 to 130 1.4998 



130 to 135 1.5032 



135 to 140 1.5050 



Elemental analyses of these fractions have been made by 

 Kafuku, proving that some of the fractions consist entirely of 

 sesquiterpene alcohol as shown in the following:: 



0.1652 gram of the material gave 0.4920 CO, and 0.1655 H s O. 



Required for Found. 

 C, r ,H 2 ,0. p tr cent _ 



Per cent. 



C 81.08 81.23 



H 11.71 11.74 



This sesquiterpene alcohol is not a crystal like guajol or 

 cedrol, but is a colorless, viscous fluid, sometimes giving a pale 

 green color. 



