( 5®^4 ) 
Viper, Dr. Franciniimiltd at that phancy • but to giVefuIl 
latisfaftion about it, he made two experiments. The one was 
by making the Cock that was there to fwallow a Vipers head,* 
and then caufiog him to be well bitten in both thighs by a live 
one* But the Cock continuing lome time before he gave any 
figos of (itknefs 5 not to loofe time, he pafs'd to the other ex- 
periment, by thrufting the Teeth of a dead Vipers head into 
another pigeon, that had before got down one of thofe heads 
into his belly. The concluHon was, that both dyed, the Cock 
within a quarter of an hoiar, 8c thePigeon in left than 4 minutej. 
The news of thefe Experiments made many perfons curious 
to fee them perform'd once more 5 fo that, fome few days af- 
ter, a rendezvous was made in Sign*M<3g^/(?/i^^'sGarden,wherej 
befides the forenamed perfons^ met Mr. tbomas Frederu\^ Mr. 
John Godscall (two Englifli Gentlemen^J) Abbot Stro:{^t [h\^ 
Moft Chriftian Majefties Publick Minifter in this Court,)Sign. 
Paolo FalcQnieri{^x& Gentleman of the Bed chamber to the G. 
Duke)<9ign. Luigidel Bjccio, Monf.Pelletier ^Mon{. Morelle(thQ 
one Phifitian, and the other Chirargion to the G. Dutchefs,) 
Dr. Gom^Phyfitian inordinary to his Highnefs^ Dr: BeHini 
ProfefTorof Anatomy at P^y^f, Sign. Loreni^ LoreniqnidL Ma- 
thematician, and Sign* Fietro Salvetti, 
But by the by^ give me leave to tell you(for fome diverfioDj) 
that this Sign^ Sdvettiy who is one of the G. Dukes Mufitians, 
& plays on all Bow^InftrumentSjinventedabout 4 yesirs ago a 
New tuning of the AntientZir^Fio/ with the ufual 15 ftriugS)' 
by means of which tuning it is rendred wholly perfed, fo that 
you may exprefs upon it all 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 traej 
'tis only for Melancholly and paffiooat matter,and not for di- 
.vifioiij as is the proper nature cfthe Lira. I {hall only add, 
that with theabovefaid tuning he afcends mJlte as high as G, 
Sol^ F^e, m 3 and defcends as low as double C, SoIJa:^ uti and 
can make every where the fame Concords as above/ 
This faine perfon having applied himfelf to the ftudy of the 
Mathematicks^and particularly about the Pmortiom oiHarmo- 
ny.tehtmg to his profeffion of Mafick,began to delight h'mUi 
in Opticks and other parts ; And not being content with the 
Theory.he went on to put it in pradice by making Telefcope^ 
of 
