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Description of large still and Condenser : — 



(1) Boiler. On many Estates where rubber and 

 other produce is grown the question of steam has already 

 been settled and there would be no necessity for another 

 boiler. For experimental purposes however a small boiler 

 had to be erected. This consisted of a simple cylindrical 

 boiler which was erected horizontally on a simple brick and 

 cement foundation and was fired externally by wood. The 

 boiler is fitted with a water level, and safety valve, together 

 with an opening for filling at the top. 



(2) Still. A pipe from the boiler conducted the 

 steam below a perforated plate in a plain cylindrical still, 

 the leaves, wood, etc., to be distilled, being placed on the top 

 of the perforated plate, the still being charged from the 

 top. The top of the still was fixed by means of nuts and 

 screws and rendered air tight by asbestos rings. 



(3) The Condenser. The condenser was a kind of 

 quadruple Liebig condenser, consisting of a vertical 

 cylinder containing four copper tubes connected above and 

 below with an air space. The tubes were surrounded with 

 the cooling water which was led in by means of a pipe over 

 the bottom and flowed away near the top. The bottom and 

 top of the condenser were fixed by means of nuts and screws 

 and rendered air tight by asbestos and were detachable for 

 cleansing purposes. A short bent copper tube from the 

 bottom air space carried off the condensed steam, camphor, 

 and oil, which was collected in glass vessels. 



The boiler, still, and the outer shell of the condenser 

 were constructed of iron, the tubes of the condenser and 

 upper and lower plates attached to these tubes were of 

 copper. The following are the dimensions of the above 

 apparatus and the capacity of the still in terms of fresh 

 camphor leaves, prunings, and wood (the latter cut up into 

 small pieces). 



Boiler. Length 2 feet 9 inches. 



Diameter 1 foot 9 inches. 

 Still. Length 2 feet 6 inches. 



Diameter 1 foot 9 inches. 



Capacity in terms of camphor leaves 30 lbs. 

 Capacity in terms of camphor wood 90 lbs. 

 Capacity in terms of prunings 50 lbs. 



Condenser. Length 2 feet. 



Diameter 9 inches. 



Length of copper condensing tubes 1 ft. 9 ins. 

 Diameter of copper condensing tubes 1 inch. 



