mains always^ cIeaT,bm in Cryftal of Pifa grows f ur&idln a ftvr 
Ai?«y/,and then roilky^and in few daysafter, yellow, and at Jaft 
bitter 5 whereas in Cryftal of Rvme znd Venice it grows not 
troubled but after 2 or 5 days^di^A n^ever yellow,nor bitteriand 
in Cryftal of Paris it will fcarce grow turbid but after a very 
confiderable time : Which whether it depend upon the diverfi- 
ry of the materials, or the different way of preparing the Cry- 
ftal, or borhjor upon other caufesjs here curioutly difcufled. 5. 
ThatPowder made of Niter^Sait of Tartar ScFlower of Sulphur, 
will Ibmetimes fulminatc/ometimes not. 6,That Oyl of Tobac- 
co kills not all aDimalSjnordifpatches ihofe whichit kills in the 
fame (pace of time^ Where he fpeaksof the great differencejhe 
found between the Tobacco of Er^y?/ and that of%t.€hrifiopherjh 
astothiscffed: Varino and i^yi/K-Tobacco producing almoft 
the fame effcdjwhereas that oiii.Chriftophers^terrmova^ Nkve^ 
St. Afartyp, h2iVt very different cffedts, 7. That the {iOii Torpeda 
caufeth uupefafiioDjbut to our Author theo ouly^when he held 
and fqueefed itjOot at any the leaft diftance. The Filh he difle* 
fted, to fee whether be could di(covcr the feat and c^iufe of its 
ftupefaftive power s, and nores/hat all that partof it between 
the gills andhead, and the place where the fins are, as far as to 
the forcmoft extremities of the whole body of it^is taken up by 
a fibrous,foft and very white fubftance, the fibres being as big 
as a big fwans quill, and interlaced with nerves and fanguine? 
GUs veffels 5 and the ends of theie fibres reaching to and touch- 
ing the skin of the filhe's back and breaft,fo that they all united 
together form two Mufcles of a falcate figurCj weighing 3^ IK 
in a fiflb of 1 5 pound weight, as this was.In which two Mufcfcs 
he fufpefts that'benumming force to rcfide more than in any 
other part j obferving^that that virtue was felt more vigorousa 
when he took the Torpedo (queefed it inhishand^at which^ 
it ftrove to Aide away* By the by, he took notiqe^that the Jr^ 
of this Fifties £j?e is of fuch a figure^that half of itjs concave,the 
other half convex^ and that the convex part entriog into the 
concave^the pupill is clofed.Many other things he obferved in 
this Fifhjwhich fee in the Book it feIR 8. That certain Water- 
nH$s or Efts m Brafil^ Cuba^ Mexico^ breed a ftoue in their ftp- 
mach, which being pulverifed are h^Ximem$ Umk\i affirmed 
to cure Nephritical pains^asd even to breafcthe ftone. Which 
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