( $0^4 ) 
Viper, Dr. Fr ancim (mikd at that phaocy • but to giVefuU 
(atisfadion about it, he made iwo experiments. The one was, 
by making the Cock that was ttiere to fwallow a Vipers head, 
and then caufiog him to be well bitten m both thighs by a live 
one* But the Cock continuing lorae time before he gave any 
figns of ficknefs 5 not to loofe time, he pafs'd to the other ex- 
periment, by thruftlng the Teeth of a dead Vipers head into 
another pigeon, that had befor-e got down one of ihofe heads 
into his belly. The conclulion was, that both dyed, the Cock 
within a quarter of anhour,& thePigeon in Icfs than 4minutes. 
The news of thefe Experiments made many perfons curious 
to fee them performed once more 5 fo that, fome few days af- 
ter, a rendezvous was made in S!gn.M^^^/(?/^AGarden,where, 
befides the forenamed perfons, met Mr. Thomas Fredericl^y Mr. 
JohnGodscaR (two Englifli Gentlemen,^ Abbot Stro:^ (h\% 
Moft Chriftian Majefties PubHck Minifter in this Court,)Sign. 
Taolo Falcomeri(fir&. Gentleman of the Bed chamber to the G. 
Duke)<yign. Lui^i del J^ccio^ MonUPelletier^l/lonL Morelle (iho. 
one Phifician, and the other Chirurgion to the G. Dutchcfs,) 
Dr. GomWPhyfitian inordinary to his Highnefs, Dr. Bellini 
Profeffor of Anatomy at P^/i, Sign. Loren^^o Loren^^mia Ma- 
thematician, and Sign* Pietro SalvetH, 
But by the by, give me leave to tell you(for fome diverfioOj) 
that this Sign* Salvetti^ who is one of the G. Dukes Mufitians, 
& plays on all Bow JnftrumentSjinventcd about 4 years ago a 
New tuning oftheAntientZ^V^F^o/ with the ufual 15 firings r 
by means of which tuning it is rendred wholly perfed:, fo that 
you may exprefs upon it ail Concords, Difcords, and alfo the 
imperfeft Concords, as feavenths, fixths, &c. as well as upon 
any Virginal that hath the quarters of Notes upon it.'Tis truCj 
'tis only for Melancholly and paffionat mattcr,and not for di- 
vifion, as is the proper nature of the L/>«. Ifliall only add, 
that with theabovefaid tuning he afcends in Alte as high as G, 
Sol^ T^e^Vt'^ anddefcends as low as doubled, Solja^ ut^ and 
can make every where the fame Concords as above^ 
This fame perfon having applied himfelf to the ftudy of the 
Mathematicksjand particularly about the Proportions oiHarmo^ 
yay^relating to his profeffion of Mufick,beganto delight himfelf 
in Opticks and other parts : And not being content with the i 
Theory,he went on to put it in practice by making Tclefcopes 
of 
