10 DISTILLATION OF RESINOUS WOOD BY SATURATED STEAM. 



APPARATUS. 



A sketch of the retort used for the distillations is shown in figure 1 . 

 This retort was designed for use in extraction of tannin from wood 

 and bark, as well as for distillation experiments; It was therefore 

 made of copper and had the closed steam coils B. The perforated 

 plate C was designed to hold up the charge while the lower head of 



VCHTICAL SfCT'OM Of A C7OXT 



FIG. 1 Experimental retort. 



the retort was taken off; then by revolving the plate until the slots E 

 came opposite the supporting lugs F, the plate falls and the charge 

 can be removed. The pressure gauge was attached at D. The other 

 parts of the retort require no special description. An ordinary copper 

 worm condenser was used and the distillate was caught in 1 -liter 

 graduated cylinders. 



