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But to avoid, as much as might be, unnecefTary 
privation of animal life, I feledted at various times 
many objects, more than I lhall, for a particular rea- 
fon, at prefent relate 5 but moft of them immediately 
devoted to death by the butcher for the ufe of the 
market, if I had not been prefent. 
The firft experiment I propofe to relate, was made 
by cutting four inches of a young lamb’s fkin, which 
covered the great tendon of the hinder leg, and is 
known to anatomifts by name of the Tendo Achillis, 
This of courfe caufed violent ftruggles, and other 
marks of the injury felt ; and on touching the ex- 
tremity of the Ikin, whilft united to other parts of 
the animal, it cried loud, urined, and voided its ex- 
crement, when I poured diluted fpirit of vitriol upon 
the edges of the Ikin, that were fixed to the conti- 
guous parts } but did not exprefs much pain by irri- 
tating the raifed Ikin, at the fartheft extremity of its 
feparation, by an affufion of diluted fpirit of vitriol. 
Nearer however to the fixed parts underneath, the 
fenfation in the raifed part of the fkin continued 
'much longer. 
I then made the butcher cut into the tendon half 
way, and divide it upwards more than two inches, 
and attentively flood over the animal, to watch his 
motions, and difcover if there was any apparent pain : 
but whilft that was doing, I could difcern none, nor 
any marks of fenfation in the animal, whilft I handled 
and pulled the cut tendon, nor yet any on touching 
it with dulcified fpirit of nitre, and fharp acid fpirit 
of vitriol ; and what yet furprifed me more, was to 
find the creature as infenfibie upon the tendon, as if 
it was a mere piece of glue, when I put a ftrong 
VoL. 4p. I i muria 
