161
Feb: 14. 1677.
S
r Ionas more vice president tooke
the Chair.
The minutes of w
t. pa
ssed
the La
st Day of meeting were read. and some parts
di
scour
sed. after w
ch.
An Experiment to proue the force of the compre
ssed air was shewn by
m
r. Hooke by which it euidently appeard that the force nece
ssary to
conden
se. the air was always proportionate to the conden
sation which was
veryfyed by seuerall tryalls of seuerall Degrees of conden
sation. that
is to conden
se the air twice Requird twice
the strength & 3
ce. three
times
the strength &c. that is if the same quantity be conden
sd then the
force or weight of the power that makes
the conden
sation shall alwayes
be reciprocall to the Dimen
sion. but if the Dimension be the same
then the force shall be always proportionall to quantity of air conteind
in that space. this was experimented in a tube of gla
sse about
ten foot long, the one end of w
ch. was seald vp hermetically and
turned or bended back againe in the forme of a syphon reuer
sed
in w
ch. reuer
sed part there being left
about 10 inches of air quick
siluer
was powred into the other part till the weight thereof had con
den
sed the same into fiue inches space the height of w
ch cylinder
of
was found to be about 30 inches. then the pouring in of
was continued till the same air was conden
sed into two inches
and an half and the ^ /height of the/ cylindricall mercury was found to be 90 inches
and the same proportions were obserued to be in other compre
ssions
S
r. Ionas more Presented the foot of a Sea Fowle for the Repository
being a and suppo
sed the foot of a _
He al
so gaue a Large hornets ne
st brought from the we
st indies w
ch. was
seuerall large combes fa
stned vpon the twig of a bough and very
thick couerd w
th. a sort of Leaues or rather cloth of the make
of
the Hornets w
ch. being Looked vpon w
th. Gla
sses was found to
be made vp of abundance of small threeds and looked much -
like the texture of paper w
th the
se the whole structure of combes
was clo
sely enwrapped on euery side as if De
signed to shelter
and inclo
se the
. . . ne
st of the
hornets /young/ from the Iniurys of the air
and weather being a kind of naturall Hiue.
Ref: CELL/RS/HF_163 © Centre for Editing Lives and Letters
