68 
on account of their fmallnefs, being no larger 
than grains of fand. This part is invefted with 
a moti delicate coat, through which are {pread 
_a great. many pulmonary tubes: it 1s befides 
covered with particles of fat, which I have en- 
deavoured to reprefent by dots on the figure of 
the marrow. All the nerves iffuing from the 
{pinal marrow are covered with a continuation 
of the fame coat, which invefts the marrow 
itfelf; and they are likewife furnifhed with 
pulmonary tubes, which accompany them in 
their moft delicate ramifications. 
The {pinal marrow, viewed fideways, has 
quite a different appearance from that which 
the figure here given of it reprefents; for, on 
looking at it in this manner, it appears fituated 
lower than the brain, Tab. XLUI. Fig. vii. a, 
and looks fomewhat crooked, 4. This form, 
Iam inclined to think, was purpofely contrived 
to allow a freer pafiage to the gullet, where 
it runs down, like an inteftine, from the jaws 
to the ingluvies, or fwallow. This is the rea- 
fon why the brain is placed above the gullet, 
and the gullet, together with the ftomach, refts 
‘upon the {pinal marrow, and its nervous rami- 
fications: fo that, properly fpeaking, the {pinal 
marrow refts upon the mufcles of the rings of 
the body in the under part, and is cufhioned 
up with particles of fat on every fide. 
The conftruation of the muf{cles, which in 
this infect move the rings of the body, 1s very 
fingular and furprifing. I difcovered three dif- 
ferent kinds of them, without examining far- 
ther than the foremoft part of the thorax ; fome 
defcending obliquely with two bellies, Tab. 
XLIU. Fig. 1x. aaa; fome broad ones run 
The B OvONK aoe | 
Ne AQT SY U2 RTs srr, - 
croffways, 54; and others again afcend oblique- 
ly, ce. All thefe mufcles are fo elegantly 
fituated, that the greateft adepts in defigning 
and painting, I am certain, mutt confefs their 
inability, were they to go about reprefenting 
them as they deferve to be figured. To exhi- 
bit exactly every thing worthy of notice con- 
tained in thefe parts, we fhould be obliged to 
make ufe of figures twenty times larger than 
thefe now before us. And, after all, the mut& 
cles which I have called the obliquely defcend- 
ing, and which have two bellies, do not, pro- 
perly {peaking, deferve that name; for they 
appear to have five tendons, of which one is 
inferted into the mufcle that lies next to it, and 
the other four into the tough rings of the body, 
which they ferve to move, as I have endea- 
voured to reprefent, if the unfpeakable magni- 
ficence of God’s works can at all be repre- 
fented by human art. An infinite number of 
pulmonary tubes are diftributed all over thefe 
mufcles; but, as yet, I have not been able to 
difcover in them any infertions of the nerves: 
fo that I muft, in this point, own myfelf as 
much at a lofs, as ] have upon many other oc- 
cafions. 
As to the heart, which fends the white or 
aqueous blood of this little creature, in a due 
circulation, through the body, I could by no 
means difcover it; and this I attribute to its 
{mallnefs, and to its being of a thin and deli- 
cate ftruGture. But I am perfuaded, that it 
lies in the upper part of the back, like that of 
Silkworms; for I could plainly difcern pulfa- 
tions in that part. 
An account of the manner in which Mites get into cheefe, and caufe it to rot, in- 
fread of being caufed by or formed themfelves out of rottenne/s; with many other 
uncommon observations. 
Pals HE parts I have hitherto mentioned and 
defcribed, are all I have been as yet able 
to difcover in this minute infec&t. And now let 
the fharpeft geniufes, and men of greateft pe- 
netration and learning, judge if a creature, in 
the fabrick of which there plainly appears fo 
much art, order, contrivance, and wifdom; 
nay, in which is feen the hand itfelf of the 
Omnipotent God; could poflibly be the pro- 
du&tion of chance or rottennefs! Is not the 
light of human underftanding alone, unaflifted 
by divine revelation, fufficient to convince us, 
that it cannot be fo? Certainly it is fufficient. 
The illuftrious Redi as evidently proves, that 
this fyftem of the production of animals from 
putrefaction, affifted, as they would have it, 
by heat and moifture, is a mere idle imagina- 
tion, founded on the erroneous maxims of 
heathen philofophers, unacquainted with any 
fuperior origin of exiftence. 
That ingenious naturalift moft accurately 
explains in what manner Mites proceed from 
Flies, which have depofited their eggs in the 
cracks and holes of cheefes*: andIcan add to 
his account, that the body of thefe Flies ter- 
minates in fo fine a point, that they are able to 
thruft it into, and penetrate very deep in, the 
{malleft openings. I cannot but alfo take no- 
tice, that the rottennefs of cheefe is really oc- 
cafioned by thefe Worms; for they crumble 
the fubftance of it into fmall particles, and 
void their excrements in it, and foul it with 
their faliva, or the moifture of their mouths ; 
fo that the fmalleft {pot of rottennefs, produced 
by thefe infects, cannot but immediately fpread 
itfelf. . I once obferved a cheefe, which I had 
purpofely expofed to this kind of Flies, in order 
that they fhould lay their eggs in it, grow moift 
in a fhort time, in thofe parts of it where thefe 
eggs had been depofited, and had afterwards 
* This f{pecies of Maggot, though altogether different from what we call the Mite, is not uncommon in large cheefes, ‘particu- 
larly in fuch as have not been well made, and have fermented. In fuch cheefe, where it is moderately foft and damp near the fur- 
face, thefe Maggots are frequent; and if they fall off, on being difturbed, they will leap about, upona dith or table, in a furprifing 
ymanner. 
been 
