Led. IL. with feveral Menfiruums. 
46. §. Oyl of Vitriol and Spirit of Salt, though both acids, yee 
make a ftrong Effervefence, with noife and fumes. Which further con- 
per what was noted before, 2. that Spirit of Salt isa fubalkaline 
cid. 
47. §. Spirit of Salt Armoniac,with Oyl of Vitriol, makes an Effer- 
vefcence fo extraordinary quick, and as it were inflantaneous,that nothing 
feemeth quicker. Whence it is probable, That if Gun-powder were 
made of Salt Armoniac, inftead of Nitre, or with both mixed together 5 
it would be far ftronger, than any kind now in ufe. And thus far for 
Minerals, 
_ 48. §. [have only one Corollary to add, from the whole; which 
is, That whoever doth undertake the Natural Hiftory of a Country, 
(fuch asthat the Learned Dr. Plot hath exceedingly well done of Ox- 
fordfhire ) the foregoing Method, feemeth fo slic cheap, and inde- 
ceitful, for the finding out and well diftinguithing the natures of all 
kinds of Metalls, Ores, Salts, Earths, Stones, or other fubterraneal Bos 
dies 5 as cannot, I think, be fupply’d, but by others of greater difficul- 
ty and expence, 

GHA Pe PPL 
What may be obferved of the P ARTS of Animals. 
SS) NO W proceed tothe feveral Parts of Avimals 5 a8 
Hairs, Hoofs, Horns, Shells and fhelly Infects, Boues, 
Flefh and the feveral Vifcera, Silk, Blood,Eges,Musk , 
Caftor, Gall, rine, Dungs, Salts and Stones. 
2. §. And firft of all, the Hair of a mans head, 
; with Oyl of Vitriol, maketh xo Bullition at all. Nor 
S @ yet with Spirit of Nitre. So that although it con- 
tains a good deal of volatile Salt; yet it feemeth either not to be alka- 
line, or elfe is centred in fo great a quantity of Oyl, that the acid men- 
Jftraum cannot reach it. 
3. §, Hares Fur, with fpirit of Nitre, maketh, although a fhort, yet 
wery plain Bullition and huff. Hence the Hair, and therefore the Blood, 
of fome Avimals, is fuller of Salt, at leaft of an Alkaline Salt, than 
that of fome others. And perhaps the Hair of fome men, as of Black's, 
may be fo full of salt, as to make a Bullition like Hares Fur. 
4. §. The shavings of Nails ftir not at all, either with Oyl of Vitriol, 
or Spirit of Nitre = only with the latter they turn yellow. But Elks Claws, 
with spirit of Nitre, make a fisall and flow Bullition. 
5. §. Horfes Hoof, mith Oyl of Vitriol, ftirs not of veany hours. But 
with Spirit of Nitre, allowing it fome time, makes a very plain Bullition, 
and huffs up very high. 
6. §. Cows Horn, neither with Oyl of Vitriol, nor with Spirit of Ni- 
tre, maketh any Bullition, only turneth to a yellow colour. 
7. §. Rams Horn flirs not with Oyl of Vitriol 5 but with Spirit of 
Nitre, makes a forall and flow Bullition. ey 

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