



LeEaAL. wish fookal Maypiewatis, a 

Contents, From this and fome of the following Experiments, it alfo ap- 
pears, That the sa/é which concursto the generation of Gravel or of 
a Stone in the Kidueys or Bladder, is of a very different nature from the 
Salt of Urine, 
33. §.. Next for Dungs. And firft, dryed Goats-dung makes with 
Spirit of Nitre, a fieall Bullition, but no elevation, That of Mice the 
Me And that of Cows. So that of all I have tryed, thefe three fiir the 
eajl. 
34. §, Goofe-dung, with Spirit of Nitre, makes a very fall Bulli- 
tion and fome elevation. But it requires time. Oyl of Vitriol flirs it 
not, 
35. §. Album Grecum, with Spirit of Nitre, befides inunmerable 
fuall bubbles, rifes up with fome great ones, exatly refembling the buffing 
up of Left or Barat.  Alfo with Oyl of Vitriol it maketh fome little froth, 
but flomly. So that it fhould feem, that the Bones area little opened by 
fome acid Menstruum in the Dogs ftomach (as the body of Steel is in its 
preparation with Sulphur) whereby it becomes a good mild Topick in 
Quinzies. 
36. §. Hens dung, with spirit of Nitre, makes a very great bullition 
and huff: greater and quicker, than any of the rest above-named. 
37. §. But of al Ihave tryed, Pigeons dung, with the fame Spirit, 
maketh the greateft and the quickeft Effervefeence and huff and that not 
without fleams. Yet neither the fame Dung, nor that of Hens, is moved 
in the leaSt with Oyl of Vitriol, The Caufe of fo great an Effervefcence 
in thefe, more than in the reft, is that white part whichis here mixed 
in a great quantity with the Dwg, Which white part, defcendeth 
not from the Stomach, but is an Excrement {eparated from the Blood 
(as the Urine in other Avimals ) by a peculiar Orgaz, which evacuates 
it into the Iteinun reum ; whence, together with the Stercus it is 
excluded. Hence it isevident, That in the {aid white part of Hens, 
and efpecially Pigeons dung, is contained a great quantity of a vola- 
tile Alkaly. 
38. §. proceed to Salts. Aud firft Salt of Blood and Urine both 
make a more durable Effervefcence with Acids, than doth salt of Worm- 
wood, or Salt of Fern, Hence the former are more akelie, than 
the latter. 
39. §. Again, though divers other Animal Salts will not fiir with 
Spirit of Salt, or with Oyl of Sulphur or Vitriol s yet the Salt of Blood 
will make an Effervefeence with all kinds of Acids, , Whence it is further 
argued to be highly alkaline, and very proper for the correéfion, of 
all forts of preternatural Acids inthe body. There is little doubt, but 
that Spirit of Herts-horn will do. the like. 
40. §. The Gravel which is precipitated out of Urine 5 with Oyl of 
Vitriol makes no bullition in the leaft. Nor with ftrong Spirit of Salt. But 
with Spirit of Nitre, it wakes a wery great one, with Effervefcence and 
foeams,. From hence it appears, That there is much difference to be 
made in the ule of acid Diureticks, Nephriticks, 8c. 
4t. g. And that I may not altogether omit to mention, what may 
be fo much for the good of mankind, Ido here declare, That for pre- 
venting (Ifay not, the breaking, bue preventing.) the generation of 
the Stone, either inthe Kédweys, or inthe Bladder, there are not bet- 
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