179
March . 21. 1677/8. Entred
The Presidents & vice presidents being absent m
r Daniell colwall was de
sired
to take the chair.
After the minutes Of the la
st Day had been read. A di
scourse aro
se about
the Phosphoros Baldwinj. concerning w
ch. It was affirmed that the same
was now made in England as good as that w
ch. was brought from beyond
Sea, and It was de
sired that one of them might be procured to be exami
ned at this Society at their next meeting. w
ch. m
r Hooke sayd he
would Indeauour - -
m
r. Hooke Read a Letter and Relation w
ch he Receiued from the Presid-
they being both sent to him from Cap
n. Rich
d Rolland from Tangier Feb:13
1677/8. conteining an account of his tryalls made
wth in the deeps of the
Sea wherein he obserued that hauing according to m
r Boyles Directions
Lowered by the Deep sidge line a bottle of oyle of ani
seeds and two other
bottles only filld w
th air, into 8 fathom water & there sufferd them to stay
a quarter of an hower. the oyl was congeald & the
stoppers cork droue
into
the bottle but
the stopper had Leakd through its pores through w
chthe same vpon pulling vp indeauourd to gett back making a noy
se &
smoke. The second Exp
t. was w
th 3 bottles in 100 fathom water the two -
bottles stopd w
th. Lignum vitae were broken by the pre
ssure of
the water driuing
them into
the neck, the other stopd w
th cork was taken vp whole but
the -
cork drouen into
the bottle &
filld the bottle filld w
th water w
ch vpon being
ta
sted seemd somew
t fresher then the re
st.
vpon this obseruations a di
scour
se aro
se about more exact ways of making
the
se kinds of tryalls in the Sea and other Deep places. And m
r Hooke
affirmed that he had a way how to examine the pre
ssure to any depth w
ththe greate
st ea
se Imaginable and that was by a cane of gla
sse w
th w
chthere had been seuerall tryalls made neer Sheerne
ss of w
ch. there is an
account on the Regi
sters. he had
as also other ways for examining
the heat and cold of tho
se submarine Regions. and to fetch vp the
water from any depth as also to fetch vp the earth sand &c from
the bottom. That he would Giue Directions for the making of such
an apparatus if there were proper persons appointed to make
tryall w
th them.
Herevpon mention was made of great Depths of waters w
thin Land
as of that of the lake of Geneua many hundred fathoms deep-
D
r. mapletoft related that Cardinale d'e
stree had cau
sed the Lake de'
Acqua by Padua to be founded but could find noe bottom w
th a whole
boatfull of Line-
Ref: CELL/RS/HF_181 © Centre for Editing Lives and Letters
