[1283] 
There are other imperfed: obfervations, which I have 
made of this our Purple-Fip 5 which I may in fome time 
give you a better account of, z//^. i At what age of the 
Moon, and time of the Tides (i. e. Spring or Neap,) 
their Veins are fulleft, and give thebeft Tindure for 
I have found a difference, they being fometimes fuller 
and whiter, and the juice more vifcid, at other times 
more flaccid and watery. 
2 Whether they are in greater perfedion in Summer 
or Winter f having not, as I expeded received any of 
them this laft Summer, to make that experiment; by rea* 
fon of our Weftern troubles in the late Rebellion. Such 
as are inclined to thefe Inquiries, and have more liberty 
from bufinefs then I have, may make farther improve- 
ments of this thing, in the preparations of it by Urine, 
Saltj&c.mentionedbyP/^Vzy and other ^-2^^^^?rx. And al- 
though the Shells are fm all, yet their abundance on our 
Coaffs, may yield matter enough, (with the more pains) 
to dy a quantity of fine Wooll, or Silk, foas to render 
the difcovery fome way ufefuU, and to anfwer the vulgar 
objedtion of eui bono , made by fuch perfons, who own 
no good but what relates to the Body, I am of opinion 
there may be found on our marine Coafts, fome big- 
ger Shells, which may have a colouring juice , though 
not the fame with this, for that I know few Naturall 
things both of Animals and Vegetables, but what have 
divers forts of the fame kind in the fame place. This 
may be a fufficient intimation to all Ingenious perfons, 
living near the Sea^ to imploy fome time to find this 
out. 
My purpofe was, with this difcourfe to have drawn and; 
fent you figures of thefe Shells, with theFifli pulled out, 
and extended beyond the Vein, together with their O- 
perculum ; to which end I fent lately for fome of them^. 
but they being not yet come (to fatisfy the defires of, 
fome Gent, of the Society) I have fent it now, (in that, 
y y y 3 particular/) 
