e coloured Lines or _Irises_, as I may so call them,
were some of them much brighter then others, and some of them also very
much broader, they being some of them ten, twenty, nay, I believe, neer a
hundred times broader then others; and those usually were broadest which
were neerest the center or middle of the flaw. And oftentimes I found, that
these Colours reacht to the very middle of the flaw, and then there
appeared in the middle a very large spot, for the most part, all of one
colour, which was very vivid, and all the other Colours incompassing it,
gradually ascending, and growing narrower towards the edges, keeping the
same order, as in the _secundary Rainbow_, that is, if the middle were
Blew, the next incompassing it would be a Purple, the third a Red, the
fourth a Yellow, &c. as above; if the middle were a Red, the next without
it would be a Yellow, the third a Green, the fourth a Blew, and so onward.
And this order it alwayes kept whatsoever were the middle Colour.

There was further observable in several other parts of this Body, many
Lines or Threads, each of them of some one peculiar Colour, and those so
exceedingly bright and vivid, that it afforded a very pleasant object
through the _Microscope_. Some of these _threads_ I have observed also to
be pieced or made up of several short lengths of differently coloured
_ends_ (as I may so call them) as a line appearing about two inches long
through the _Microscope_, has been compounded of about half an inch of a
Peach colour, 1/8 of a lovely Grass-green, 3/4 of an inch more of a bright
Scarlet, and the rest of the line of a Watchet blew. Others of them were
much otherwise coloured; the variety being almost infinite. Another thing
which is very observable, is, that if you find any place where the colours
are very broad and conspicuous to the naked eye, you may, by pressing that
place with your finger, make the colours change places, and go from one
part to another.

There is one _Phaenomenon_ more, which may, if care be used, exhibit to the
beholder, as it has divers times to me, an exceeding pleasant, and not less
instructive Spectacle; And that is, if curiosity and diligence be used, you
may so split this admirable Substance, that you may have pretty large
Plates (in companion of those smaller ones which you may observe in the
Rings) that are perhaps an 1/8 or a 1/6 part of an inch over, each of them
appearing through the _Microscope_ most curiously, intirely,