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Sr. Iohn Hoskins objected that the motion of the muscle
could not be from the swelling or shrinking of the air
because that for that Dr. Godderd had by an Expt. made
in a vessell of tin in wch. the A mans arm was included proud
that . . . the . . . Arm tooke vp noe more room in the
water when the muscles were intented & made vse of to
pull then wch. they were sufferd to Lye still wthout strain
=ing.      To which mr Hooke answerd that that expt.
was not at all sufficient to proue or Disproue the swell
ing or shrinking of the muscle. for that there being
allways some motions /muscles/ that doe counter ballonce
the other, Look how much the one doth swell the other
doth shrink and soe the same space is always filld
by the two antagonist muscles together.

Sr. Chr: Wren supposed the swelling and shrinking
might proceed from a fermentatiue motion arising
from the mixture of two heterogeneous fluids

Some Difficultys occurd in this Hypothesis how the
motion of some muscles should continue soe long
after they were cutt off from the body of the Animall
mention was made of the muscles of the skin -
in fleaing a dead animall, of the Parts of Eeles
cutt asunder. of froggs after the heart lungs
and Entralls were taken out
Mr Hooke affirmed that he had obserued the
heart of a monk fish to beat many howers
after it was cutt out of the Body.

Ref: CELL/RS/HF_200  © Centre for Editing Lives and Letters