Hooke Folio
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© The Royal Society

200

mention was made of Diuers who refreshed themselues by the help of
spunges Dipt in Oyle, this was mentioned vpon Mr Hills mentioning
that mersennus had related that Diuers a Vrinator could hold his
breath & continue vnder water for an howr & an half wthout
comming vp to fetch breath. but that he had retracted this Relation in are
Action and acknowledgd himself to haue been misinformed

mr. Henshaw added that the seal fish did vsually Receiue his
food at the top of the water ^ /& vpon the land/ and then diue to the bottom and Eat it there
It was discoursd that the specticall vse of the air or respiration
was hard to be ghesst at. for some Expts. had proued there might
be a circulation wthout the motion of the Lungs. And that
a man might be stifled though he did moue the Lungs and breath
prouided it were not fresh air. this was thought a good argu
ment to proue what mr Hooke had asserted that Air was
The Pabulum . . . of the Animall spirits, and that wch
was the principall cause both of the heat & animall mo
tion, for that the blood was in the Lungs both impregnated
wth. fresh air and soe Receiued an Inliuening florid arteriall
colour, and also did Discharge great quantity of steames
and fuliginous matter that was conteined in it -

This gaue occasion to Discourse of the reason why seuerall creatures
Leaue a sent behind them where they passe soe that Doggs are
able to follow them thereby a good while after they haue
passt along. -
mr. Hall obserud that in hunting a Deer the doggs would
not always take the sent from the ground but /sometimes/ also
from the boughs of trees or any other thing where on the
breth of the Deer might settle -

Consonent /vpon/ this ^ /Discourse/ It was /added further/ obserued that there were continuall steames
Issuing from Animall bodys, not only by the Lungs which Vented
the Greatest quantity but euen from all the other parts of
the body. And it was remarked that If a man in cold
weather Did wth his shooes stand vpon a marble stone
he would presently Leaue an impression behind him vpon the
stones though his shoosoles were perfectly dry. as was presently experimented
It was judged by some such steams as these left on the ground
vpon ^ /wch/ a man walkes . . . /a Dogg/ might be able to follow him by
the sent