[ i6o ] 
dye. I do 'not doubt bat that, in making incifions in 
the bark, one might even obtain a juice which 
might be turned to fome ufe : for the blacks of our 
painted cloths, which are preparations of iron with 
nut-galls, after a certain number of wafliings, are 
quite fpoiled, and only leave a rufty colour behind. 
But it is not fo with the Toxicodendron foliis pinnatisy 
fince the Abbe Sauvages affures me, in his letter, 
that it is five years fince his linen, marked with the 
Juice of this plant, has retained the black fpots, not- 
withftanding the great number of wailiings in lye it 
has gone through. 
I beg, Sir, you will prefent my refpefts to all my 
good friends, and be affured of the fincere and in- 
violable attachment, with which I lhall, during life, 
remain. 
Your mofi; humble 
and obedient fervant, 
W, Mazeas. 
LETTER 
