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it to powder: boil it in four times its weight ofdistilled water for half an hour; when cool,pour it off, first into a coarse linen filtre tocatch the fibrous particles of roots, and thenthrough paper, to catch the finer clayey particlesdilfused through it: set by the clear water, addwhat remains on the filtre to the boiled mass:if it be insipid, as I suppose it to be, then weighthe fibrous matter, and call it the Jibrous supple -merit— F. Suppose it in the example in handto weigh 10 grs.

5°- Take two other pounds of the mass freedfrom stony matter, No. II. subtracting fromthem the weight of the stony, watery, andfibrous substances already found; that is, 2lb.—2 S—2 W—2 F; pour twice their weight ofwarm distilled water on them, and let themstand twenty-four hours or longer; that is, untilthe water has acquired a colour; then pour itoff, and add more water as long as it changescolour; afterwards filtre the coloured waterand evaporate it to a pint, or half a pint; set itin a cool place for three days, then take outthe saline matter, if any be found, and set it%•

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