[ *8 ] 
the one, and the other on the opposite Side. Thefe 
Bundles are larger in great Stones : Thefe which feem, 
to the naked Eye, to be but fmali black Spots, arc, 
neverthelefs, accompanied by their Bundles. 
1 have Home of thefe Stones, where the tranfpa- 
rent Fibres, of which every Bundle is compofed, had 
left a Vacancy in the Middle of their Axes ; This 
fort of Conduit being coloured with a Matter of a 
tufty Colour, one finds likewife, fometimes, between 
the Fibres a little of this rufty-coloured Matter; and 
now-and then metallic and fhining Veins. One might 
fay, that the Ufe of thefe transparent Fibres is the 
Fame as of Strainers ; which (let the Matter be of a 
metallic Nature or not) buffer nothing to pafs thro’ 
them to the little Stones, but fuch Particles as are 
proper to advance their Growth, and fo to ferve 
them as it were for Roots. In Bits of imperfebt 
Slate, tho 5 harder, and of a bluer Colour, than the 
Sort I before mentioned, are found lmall Stones, of 
a like Figure, but different in this, that they are of 
a fine and Alining brafs Colour. They are, as well 
as the others, accompanied by tranfparent Lumps. 
One meets likewife with large Stones of the Colour 
of iron Ruft in feveral Rocks thereabout. It is pro- 
bable, that the Fontaine de Salut paffes thro' one 
like that I have deferibed ; and, if it meets with any 
of thefe figured Stones in the Sides of the Conduits 
thro' which it paffes, it cafily loofens them, and 
carries them along with it. The Bundles of tranf- 
parent Fibres flick pretty faft to the Slate or 
Rock, but are (lightly fattened to the little Stone, 
from which they are very cafily feparated. Hence it 
comes, that all thofe which fall into the Bath, or 
Fontaine 
