Alberti, Leone Battista, Architecture, 1755

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1that conccaled Water, they muſt pierce into
the
Body of the Hill, and eſpecially in one of
thoſe
Parts where the Lines or Junctures of the
ſeveral
Strata met together, which was likely
to
be the moſt proper Place for what they
wanted
, becauſe the Muſeles of the Hill meet­
ing
together muſt in all Probability form a na­
tural
Reſervoir.
Beſides the ſeveral Coats
themſelves
ſeemed to be of different Natures,
ſome
likely to imbibe, others to retain the Wa­
ter
.
Thus the reddiſh Stone is hardly ever
without
Water; but then it is apt to deceive
you
, for it often runs out through the Veins
with
which that Stone abounds.
The moiſt and
living
Flint which lies about the Roots of the
Hill
, broken and very ſharp, ſoon affords Wa­
ter
.
The light Soil too gives you an eaſy Op­
portunity
of finding Plenty of Water; but then
it
is of a bad Savour.
But the Male-ſand and
the
hard Grit are ſure to afford the beſt of
Water
, and with the leaſt Danger of being ex­
hauſted
.
It is quite the contrary with Chalk,
which
being too cloſe, yields no Water; but
it
is very good for retaining that which diſtills
into
it.
In common Sand we find but very
ſmall
Veins, and thoſe foul, and apt to have a
Sediment
.
From white Clay we have but
ſmall
Veins, but thoſe ſweeter than any other.
The ſoft Stone yields a very cold Water; the
black
Earth a very clear one.
In Gravel, if it
is
looſe, we cannot dig with any very great
Hope
; but if it grows cloſer as we come deeper,
there
is no Danger of finding Water, and when
found
, in either of them, there is no doubt of
its
being well taſted.
It is alſo certain, that by
the
Help of Art there is no great Difficulty in
finding
out the Spot under which the Vein lies:

And
the Method by which we are taught to
do
it, is as follows.
In the Morning extremely
early
, when the Air is perfectly clear and ſerene,
lay
yourſelf flat with your Chin reſting upon
the
Ground: Then take a careful Survey of
the
Country all round you, and where-ever
you
ſee a Vapour riſing out of the Earth, and
curling
up into the Air like a Man's Breath in
a
clear Froſt, there you may be pretty certain
of
finding Water.
But in order to be ſtill
more
ſure of it, dig a Pit four Cubits deep and
as
many broad, and in this Pit, about the Time
of
Sun-ſet, put either an carthen Pot juſt freſh
taken
out of the Furnace, or a ſmall Quantity
of
unwaſhed Wool, or an earthen Pot unbak­
ed
, or a braſs Pot with the Mouth downwards
and
rubbed over with Oil; then make up the
Mouth
of the Pit with Boards and cover it
with
Earth: If next Morning the baked Pot
be
much heavier than it was over Night; if
the
Wool be moiſtened; if the unbaked Pot be
wet
; if the braſs Pot have Drops hanging up­
on
it, and if a Lamp left in the ſame Pit have
not
conſumed much Oil, or if upon making a
Fire
in it, the Earth emits a good deal of
Smoke
, you may be very ſure that there are
Veins
of Water concealed.
In what Seaſon it
is
beſt to make theſe Trials has not been ſo
clearly
declared; but in ſome Writers I find
the
following Obſervations.
In the Dog-days,
not
only the Earth, but alſo the Bodies of Ani­
mals
are very full of Humidity: Whence it
happens
, that in this Seaſon the Trees grow
very
moiſt under the Bark with Exceſs of Hu­
mour
; about this Time alſo Men are very ſub­
ject
to Fluxes of the Belly, and through exceſ­
ſive
Humectation, fall into frequent Fevers;
and
the Waters ſpring out more abundantly at
this
Time of the Year, than any other. Theo­
phraſtus
thinks the Reaſon of this to be, that
about
this Time we have generally ſoutherly
Winds
, which in their Nature are moiſt and
cloudy
. Ariſtotle affirms, that in this Seaſon
the
Ground is forced to emit Vapours by means
of
the natural Fire which lies mixed in the
Bowels
of the Earth.
If this be true, thoſe
Times
muſt be beſt for the above-mentioned
Trials
, when thoſe Fires are moſt potent, or
leaſt
oppreſſed with Exuberance of Humour,
as
alſo when the Earth is not too much burnt
up
and too dry.
The Seaſon therefore which
I
would recommend for this Purpoſe, ſhould
be
the Spring in dry Places, and Autumn in
Places
of more Shade.
When your Hopes of
not
being diſappointed are confirmed in the
Manner
before ſhewn, you may begin to dig.
*

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