Sulfur continued impregnation

Buchner funnel and fill the funnel from % t0 % full of the Dynamite sample. The amt will depend on the expl oil content, which is detd from the ether extraction conducted as follows Pour in 50 mi of ether, cover the funnel with a watch glass, let stand to impregnate the sample and then apply suction. Repeat with 3 addnl 50-ml portions of ether and transfer the extract to a low beaker. Evaporate the ether at 50—60°C while passing over it a stream of dry air, taking care not to introduce any moisture. Continue evaporation until disappearance of ether odor and then for 15 mins longer. Filter off the resins, sulfur and other insol substances from the explosive oils, using a very small, fast filter paper (such as No 41 Whatman) into a rubber-stoppered bottle contg the expl oil previously obtd from detn of ether extract. 

---