POISON TREE. 
331 
linen. It is taken out every week to prevent it 
spoiling by becoming mouldy. The dried juice is 
of a dark brown colour, and liquefies by heat, like 
other resins. Its deleterious quality appears to be 
of a volatile nature, since it loses much of its power 
after being kept for a twelvemonth, and in the 
course of a few years becomes quite ineffectual. 
