In? J 
Effays o/natunl Experiments made in the Academy 
del Cimento under theProte^ion of the mo fl Serene 
. Prince Leopold /Tufcany. Englijbt hy the in-^ 
genious Richard Waller Efq^ Fellow of the Royal 
Society. 
r^' l' '-4 His work was publiflied mltalian in the year 1 667I 
I and contains leveral curious S^r/^^rm^;?^^ made i 
the Academy del Cimento ^ at Florence : the Italian 
Author thought fit to prefix ^Preface elegantly difcover- 
ingthedefign of the ^<^^^/^/??y,to advance real knowledge^ 
their Ingenuity, and Candour in communicating their 
Experiments, and their obligations to the great Duke 
Ferdinand Tufcany, Father to the prefent Doke Cofmo, 
1. The £':!^/?^rm^;2^j* are couch'd under 10 heads, treat- 
ing of ieveral SubjeBs, It were improper in this place 
to give a large account of each 1^ articular but in fhort : 
Having defcribed fome of their Inflruments, as Thermome- 
ters ( of which they feem to bidiaireft for the invmtton ; 
the firft having been brought from Florence, and fhewn 
here, tho they were reduced to a Standard, and received 
their perfeBion hence) the Pendulum, and other injiru-^ 
mentSy they come then to their firft head, the^/rj- /^r^/- 
fure, where moft of the known Mercurial Experiments are 
try ed, and confirmed, Objedlions anlwer'd, ^c, with ie- 
Ytxzl Experiments m2.^c in vacuoy upon as well animates 
as inanimate Bodys. Amongft the reft is objfervable an Ex- 
periment oi Sound -^, which may be worth repeating, vi:^. 
that an Organ Pipe founded in vacuo, fpeaks with little, or 
no difFerence, the thin jEther it leemes being capable of 
C^ufing it. Another Experimenp is related of a fmall FiJIj 
that furvived thtWrack^oi th^ x^^^^z<^z^;w,'but was thereby 
lb far difabled ^ that he could never after raife himfelfe 
in the water, but had the Serpents C//r/^ of creeping oa 
his Belly in the Mud. 
2. In their fecond Head of Free:{ing they are very cu- 
rious in examining the Expanfion^ Force;, and Proceedure 
of 
