( ) ■ 
were involved in their Membranes kept, which was a 
little upon the Green. 
This change from Green to Red puts me in mind of 
what I have obferv'd feveral times in the Eggs of a Uving 
Crab, which I have taken out of her, and breaking them 
in pieces, view'd them, and perceived that the Matter 
which lay in the Egg- (hells was Green 5 but when I let it 
dry a little, it presently turn'd from Green to Red, 
1 cut the great Canals of another Aloes-leaf, acrofs 
which appeared Yellow, ias did alfo the Sap which came 
out of the inward lying Membranes 5 and when I cut a 
Slip or Slice of fuch a Leaf, which was as thick as the back 
of a Knife, and laid it upon a Clean Glafs Plate, it turn*d 
prefently to a Peach colour, from Yellow as it had before, 
and fo did a fmall drop of the Sap upon the fame Glafs ^ 
which being almoft dry'd up^ there appeared as many Salt 
Particles in that little Matter, as if the fourth part of it 
?had been mixt with Shining Sand. 
I took a little of the aforefaid Sap, and pat it upon my 
Thumb-nail, and let it dry there, and obferv'd that it 
left a Yellowifli Colour behind it, that the Particles of 
Salt had coagulated upon my Nail after the fame manner 
as a Foggy moifture is congealed in Winter on Glafs- 
HVindows 5 and the next day I perceiv'd a Reddilh Colour 
where the Sap had lain, and where it had been thickeft 
the Red was deeper, which we call a Peach Colour- 
I tryed the fame experiment upon two other Nails of 
my Hand, and the fuccefs was the fame, and the Colour 
lafted feveral days. 
I cut a fmall Splinter of the Wood, in which there had 
%een fome Sap of the Aloes, but in which at that time there 
was but little Color to be feen, and placing it before a 
MicrofcQKe^ I faw that it gradually affum'd a Peach Co- 
lour, which in fome places was as bright and as fine as I 
ever beheld with my Eyes. 
I 
