s8o Mr. Mornay’s account of the discovery , &c.. 
crack showed the same light, which is of a phosphorescent 
appearance. I continued to bend the twig until the milky 
juice dropped out, when each drop was a drop of fire, very 
much like what I have seen on dropping inflamed tallow. 
I did not observe any particular smell. The milky juice is 
said to be very poisonous ; it is caustic, and occasions much 
itching and irritation when applied to the skin. It becomes 
viscous in the air, and soon dries of a yellowish colour, 
slightly tinged with green, when it has the appearance of a 
gum-resin. 
The above account contains all the information that I can 
give you on the subject: should you think it deserving to be 
laid before the Royal Society, I would beg of you to add your 
observations, as they would render the communication inte- 
resting. 
I am, with sentiments of the highest esteem and respect. 
My dear Sir, 
Your faithful friend and devoted servant, 
A. F. MORNAY. 
London, 27th April, 1816. 
To Dr. Wollaston, 
Secretary of the Royal Society . 
