Extract of Log′wood

Syn. Extractum hæmatoxyli (B. P.) , E. h. Camp ech i an i , (Ph. E.), L. Prep. 1. (B. P.) Logwood in chips, 1; boiling distilled water, 10; macerate 24 hours, boil to 5, strain, and evaporate to an extract, but not in iron ve els. 2. (Ph. L.) From cut logwood (logwood chips), as EXTRACT OF HOPS —Ph. L. 3. (Ph. E.) As the last (nearly). 4. (Ph. D. 1826 and Wholesale.) From the decoction. Obs. The Ph. U. S. 1841 orders the wood to be rasped. The Ph. Baden directs displacement with cold water. On the large scale, this extract is prepared solely by decoction. 1 cwt. of wood yields about 20 lbs. of extract (Brande); 80 lbs. yield 14 lbs. of extract (Gray.) It is kept in two states—hard ( EXTRACTUM HÆMATOXYLI DURUM ) and soft ( E. H. MOLLE ). The dose of the first is 10 to 20 gr., di olved in wine, or any cordial water; as an astringent, after each motion in diarrhœa; the second is often employed as a lozenge in the same disease, and is an inexpensive and agreeable remedy for simple relaxation of the bowels.