[ 3 
Madder but Three Days, became intirely white in 
lefs than a Year j and the reddeft Bones loft much of 
their Colour. And I am of Opinion, that the Dew, 
to which I have expofed fome of them for a few 
Days, will finifti the Whitening of them. 
As there is a fort of Analogy between the Nutri- 
tion of Animals and that of Vegetables, I have not 
negleded trying, if the Tindure of the Rubia would 
introduce itfelf into the Veflels of fome Plants i 
which would, perhaps, contribute much to lay open 
their Organization. 
For the lirft Experiment, in which indeed I had 
no Hopes of Succefs, I planted Two Bulbs of Tu- 
berofes in Earth, with which I had mixed a good 
Quantity Qi Madder : But 1 found nothing, either in 
the Leaves, Stalk, or Flowers, but what was in the 
common and natural State. And this muft have been 
fo : For lince it is only the Bones that take the 
Tindture in Animals, the Tuberofe, having all its 
Parts foft, is in the State of an Animal without 
Bones: Such as a Leach, an Earth-worm, a Lam- 
prey, which would probably continue in their natural 
State, whatever Quantity oi Madder were given them, 
fuppofing it could poftibly be done. 
Wherefore I refolved to try the Experiment on a 
Tree. I planted a Paradife Apple-tree in a Box, 
which I had filled with Earth mixed with a great 
deal of Madder \ and I covered the Upper Surface of 
the Earth with a Layer of Madder Two Inches thick. 
This Layer was renewed feveral times for near Two 
Years that my Tree is under the Experiment 5 but 
I have not as yet been able to examine if its Wood 
is coloured by this Root. In cafe the Experiment 
F f f a docs 
