Galbanum, Strained

Syn. Prepared galbanum ; Galbanum colatum , G. præparatum (Ph. L.), L. From crude galbanum, as prepared ammoniacum. Formerly the common practice was to melt it in the dry state, by heat cautiously and quickly applied, and to strain it through a piece of coarse canvas stretched acro a wooden frame or ‘horse.’ The ‘strained galbanum’ of the shops is seldom pure. The following forms are current in the trade for its ‘reduction,’ as this species of adulteration is technically termed:— 1. Galbanum (true), 9 lbs.; strain as above, then add, towards the end black resin (clean), 3 lbs.; and when the whole is melted, further add of Venice turpentine, 2 lbs.— Product. 12 lbs. 2. Strained galbanum and black resin, of each 6 lbs.; melt, and add, of strained a afœtid a, 2 oz.; Venice turpentine, 3 lbs.— Prod. 14 1 ⁄ 2 lbs.