For 1 pail of spirits, add 1½ lbs of birch coals prepared as follows. Pour very hot, disintegrating coal embers into an earthenware pot, blow off all the ashes to make them as clean as possible, and tightly cover the pot with a lid so that the coals die out. Remove the coals from the pot, carefully blow off the ashes, cool, and pound, but not too fine. Pour the coals into a bottle and cover with the spirits. Set aside for 3 weeks and shake the bottle 3 or 4 times per day, then let the spirits stand undisturbed on the coals for another week. Prepare another bottle, add 1 lb good, large, yellow raisins, well picked over, and 8 zolotniki finely chopped orris root. Pour the spirits into the newly prepared bottle using a funnel lined with a white flannel. Set the spirits aside for 12 days, then re-strain through a flannel. Spirits prepared in this way may completely replace French brandy in fruit liqueurs. The vodka must be diluted with boiled, cooled water; otherwise, it will whiten. To determine the strength of this vodka, consult a spirit thermometer.