( 19 7 > 
in each of which I found the Fibres to be compofed of 
fmall VelTels, like thofe of a Cod and Pearch. 
I had now a mind to examine the Mufcular Fibres 
of the Smelt, to fee whether they were likewife com- 
pofed of VelTels, but not being able at that time to 
meet with any Smelts, it came into my Head to ob- 
ferve the fame in dried Sprats. Accordingly I took 
the largeft of thefe I could light on, which was a lit- 
tle more than five Inches in length, and 1 found that 
the Fibres of the Sprat were but little thinner than 
thofe of the large Pearch fpoken of before, and that 
the VelTels of which the Fibres were compofed, were 
nearly as numerous as in the Fibres of the Pearch. 
From thefe Obfervations fome Perfons may be apt 
to conclude, that the Mufcular Fibres of Land- 
An finals are of the fame thicknefs with thofe of Filh. 
But for the fatisfadion of thofe, who have not feen 
the Obje&s here fpoken of, I have caufed a fmall- 
portion of the Mufcular Fibres of a large Ox to be 
delineated, as they appear’d through the fame Mi^ 
crofcope with the former, to Ihew the thicknefs of 
the dried Fibres, and the VelTels that compofe them, 
as is reprefented in Fig, j, by XT Z . 
I defir’d the Painter to tell me, how many VelTels: 
he could fee in the tranfverfe Sedlion of one of thefe 
Fibres ^ who, after fome paufe, reply’d, That he: 
counted five and twenty VelTels in one Fibre. 
Some time after this, I had a fmall Smelt brought 
me, of the length of about two Joints of my Finger; 
and cutting fome of its Mufcular Fibres tranfverlly 5; 
I placed them before a Microfcope, and faw not only, 
that thefe Fibres were twice as thick as thofe of am 
Ox, but likewife that they were provided with as. 
great a number of VelTels as the Fibres of other 
Ffih* Upon, 
