Part I. Of Serpents. 49 
young Ones. All Animals, faith Ariftotle, (tf)that bring 
forth their young, have alfoexternal Ears : yet knew that c . „ ; * ' 
an Adder which hath no Auricle is Viviparous. And this, 
indeed, he obferves with a good Remark, which is, That 
lhefirft lays her Eggs within her Womb 5 (.b) wherein they (b) ffiftor. 
are afterwards hatched. Which had been a fair Intro- Amm * 1 6 * 
du£tion to him, to have obferved, That all other Vivipa- 
rous Animals are Oviparous within themfelves. And 'tis 
much, that the hint hath not been long iince taken from 
the Raya, and fome other Fifties. The Viper, faith Sir Tho- 
mas (c) Brown, from the experience of credible Perfons, in EpideS. 
cafe of fear, receiveth her young Ones into her Mouth 3 
which being over, they return thence again. 
The chief ufe of Vipers is for the Medicine called The- 
riaca Andromachi. But there are alfo divers Medicines made 
out of them : as 
Oleum per Infufwnem, Sal Viper arum Spiritut, 
Oleum StiUatitium, Volatile, Efentia, 
Vihum Viper inum, Fixum, Alcohol Bur graviild) («6 Schro- 
Tkriacalc, Pnlvis Viper :Germams.{e) pharmac. 
(e) Praevo- 
Of the nature of the Viper , fee the Obfervations 
of Bourdelot, Redi, & Charas. See alfo the Phil. Tranf. 
N. 87. 
The SLOUGH of an ENGLISH VIPER, 
That is, the Cuticula. They caft it off twice every year, 
fc. at Spring and Fall. The feparation begins at the Head 5 
and is finifh'd in the fpace of 24 hours. From all parts fo 
entire, that the very Tunica Ad?iata, or outward Skin of 
the Eye it felf is here plainly to be feen. 
A Gelly made hereof, is order d to be ufed for the 
making up of the compounded Powder of Crabs Claws 
into Balls. Which way of prefervation, were no lefs pro- 
per for divers other Cordial Powders 3 efpecially fuch as 
are Aromatic^ and whofe Virtue lies in parts that are of 
themfelves volatile and eafily evaporable. Of which land, 
there are none in this Powder. 
The SKIN ofaBOIGUACU 5 a Serpent fo called, 
by the Natives of Brafile. As far as can now be feen, 
'tis mixed of a(h-colour with cancellated work of brown 3 
H fome- 
