[ 4 »* 3 
IV. Obfervations on the Mouth of the Eels m 
Vinegar, and alfo a Jtrange aquatic Ani- 
mal , fent in a Letter from the Re v d Mr* 
Henry Miles to Mr. Baker, F. R. S. and by 
him communicated to the Royal Society : 
With a Drawing and Defer ipt ion of the 
f aid Animal , as viewed in the Microfcope y 
by Mr. Baker. 
ReW March io. 
And 17. 1742-3. 
SIR , * * * * 
I Have now to tell you an Obferva- 
tion I made on one of the Anguilla 
in Vinegar (of which, by the way, I have a pro- 
digious lncreafe, though I loft all by Accident about 
a Month fmee, to about a fingle Drop or two). The 
Obfervation was made with the Camera Obfcura 
Microfcope: Firft, in a very fmall Tube, not a Ca- 
pillary one, though approaching near it, I put a 
fmall Quantity of Vinegar with feveral Anguilla : At 
my firft Sight of the Image on the Screen, I obferved 
one to have a Motion as if it had been wounded, 
about the Middle of the Back, if I may fo exprefs it ; 
it neither rofe nor funk in the Liquor, but lay in this 
Form wriggling itfelf : I thought it gave Signs 
of Pain, and would foon expire, which it accordingly 
did in a Minute’s time; but it coiled itfelf up, and 
ftuck to the Side of the Tube very clofe, before I 
was aware : I put out the Liquor, after waiting to 
fee whether it would revive, in vain, and viewed it 
