WEST IXDIAX BAY. 59 



LIGHT OIL. 



No. 1 0-870 



„ 2 0-930 



„ 3 0-946 



„ 4 0-964 



„ 5 0-982 



„ 6 0-990 



the total yield of the light oil coming over in the first 15 gallons 

 of distillate, from which it promptly separated, leaving tlie water 

 quite clear. 



The distillation was then continued to obtain the heavy oil> 

 until 65 gallons more of distillate were obtained. This oil was 

 received in three portions and the sp. gr. of each portion then 

 taken : — 



HEAVY OIL. 



Xo. 1 1-023 



„ 2 1-035 



„ 3 1-037 



The oil when first distilled is colourless, but by exposure to the 

 air quickly acquires a yellowish tint, which deepens into a rich 

 brown tint, and if the exposure is continued, the oil becomes quite 

 dark in colour just as does the oil of clove or the oil of pimento. 

 The odour of the freshly distilled oil is rank, but in the course of 

 from three to six months, it becomes mellow and ripens into the 

 agreeable fragrance so much liked. 



Twenty pounds of the crude heavy oil which had been exposed 

 to the air until it had acquired a deep brown colour, were put into 

 a 30-gallon jacketed steam still, together with 20 gallons of water. 

 The distillation was begun very slowly, and the distillate collected 

 in portions of 2h gallons. The first and second portions contained 

 about 41bs. of light oil, then the water came over of a milk-white 

 colour, and on being allowed to stand, the heavy oil subsided to the 

 bottom of the bottles. 



The distillation was very tedious, requiring 20 hours to get all 

 the oil over. When the oil had separated from the water, the 

 latter was returned to the still. 75 gallons of distillate were 

 required to complete the rectification. The 26 portions of heavy 

 oil were divided into thirteen portions by mixing Xos. 1 and 2 

 together, 3 and 4 together, and so on through the series. The sp. 



