(2014 3 
' *a;Ti6^ DoUrweof hrchimedts, i^iportimg^ That aFloatiffg 
bodyfmkj beneath the Level of thervaterfo far^as that a mafs of 
VPater^equal to the fart immerjed^ doth ahfolutelj weigh much 
as the whole floating Body 5 is falfe. 
^.Itsvery probable^ that there is no j^ther^ and that confix 
^uently there is a vajl Vacuum. 
4.,There is a very eajy, floor t^and infallible way^ exaSlly to know 
hovp much is the ahfolute weight of the Air^ that is impendent e?- 
ver any particular place ^ 
%With little lefs cajinefs and brevity ^but with the fame infciU 
Ubility may be weighed any one part of the faid Air-^f^ example^ 
^Cubical foot. 
6„lhe only way of measuring the height of the Atmojfhere. 
J. How it may be experimented^whether Light at the dijiance 
of 40 or more miles be moved in any obfervable Time <? 
The(e PropofitioDS have occalioned very warm difputes 
in //^//^where they were firft ftated ^ as may appear by what 
hath been publifht againft this Author by Signior Alontanari 
and ^igmov Finetti^to which we muR refer the Reader. We 
(hall only take notice here, that the fecond ofthefe Propofiti^ 
ons founding haiibjour Author, fomewhat to mollify it, al- 
ledgeth,That he intends not at all to. oppofe the Dodrine of 
Archimedes ^V[i\xc)\ left that of G/i//7f o^concerning FloatingBo- 
dies--, but that he v^ould confider every body equilibrated^ 
and how far every thing retains its Momentm this Univerfe, 
(where we find the whole to gravitatc,^in order to examine 
theT<zrr/^e//i^« Experiment 5 which is to ferve him for the 
tnain gt^ftund to weigh the Air, and to meafure the Atmof- 
phere y In which cafe (faith he) the Floating Body, if it did 
abfolutely weigh as much, as the mafs of water^equal to its 
part immerfedjit would not make the Equal Seftors of that 
S^feefe^whichttie Equilibrated Fluids do conftiiute , Equal 
in Moment. ■ ^^^.u i^a. . ;.!■ 
^4j.ao8j./.2p>'.Dimoftr^none.}t.r.da Dott.p.ao^'o.i.S.r. Tychanc.p. 2091 /.19 r.5. z./'.iojj./.zj^. 
L 0 SI D ON, 
Printed for John Mattyn^?nm^i to the Royal Society ^1670. 
