128 R. T. BAKER AND HENRY G. SMITH. 



index at 16° O. was 1*4903. The specific gravity at 15° 0. 

 was 0*8895. On a first rectification three main divisions 

 were detected, but owing to the presence of such a large 

 proportion of high boiling constituents the lower boiling 

 portion was not readily separated. Below 170° 0. 20°/ u dis- 

 stilled; the specific gravity at 15° 0. of this fraction was 

 0*8624, the refractive index 1*4774 at 16° 0., and the rota- 

 tion in 100 mm. tube a D + 32*5°. Between 195-225° O. 

 30°/° distilled ; the rotation of this fraction was + 5*7° ; the 

 specific gravity 0*8892, and the refractive index 1*4892. 

 Between 225 — 235° C. 20°/° distilled, this fraction was lsevo- 

 rotatory, the rotation being - 1*1°; the specific gravity 

 was 0*9048, and the refractive index 1*4945. Between 

 235—273° O. 12°/> distilled, which consisted largely of a 

 sesquiterpene, the refractive index of this fraction was 

 1*5052 and the specific gravity 0*9024 ; the rotation could 

 not be well taken, but it was lsevorotatory. The indica- 

 tions thus pointed to the presence of pinene, of a large 

 proportion of alcohols or aldehydes, of a sesquiterpene and 

 perhaps esters. 



The first fraction was again distilled, and the portion 

 boiling at 155-157° O. was collected apart. This was 

 shown to be dextrorotatory pinene. The specific gravity 

 when cooled to 15° O. was 0*8601 ; the refractive index at 

 20° O. was 1*4706, and the rotation a D + 35*5°. The nitroso- 

 chloride was also prepared and this melted at near 103° O. 

 When the oil distilling between 170-195° O. was rectified 

 pinene was again obtained. It is thus assumed that about 

 25°/° of the oil was pinene. When the oil was treated with 

 twice the volume of a 30°/° solution of sodium bisulphite a 

 solid mass soon formed, the aldehydic portion readily dis- 

 solved when heated in the water bath. Two closely 

 agreeing determinations by this method, in the ordinary 

 way, gave a mean yield of 35°/° of aldehydes. The aldehydic 



