Alberti, Leone Battista, Architecture, 1755

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1obſerv'd that in Autumn the Leaves of Trees
always
began to fall to the South-ſide ſirſt;
and
in Buildings ruinated by Time, I have
taken
Notice that they always began to decay
firſt
towards the South.
The Reaſon of this
may
perhaps be that the Heat and Force of the
Sun
lying upon the Work while it was ſtill
in
Hand might exhauſt the Strength of the
Cement
; and the Stone itſelf being frequently
moiſten
'd by the South-wind, and then again
dry
'd and burnt by the Rays of the Sun,
rots
and moulders.
Againſt theſe and the like
Injuries
therefore, we ſhould oppoſe our beſt
and
ſtouteſt Materials.
What I think too is
principally
to be obſerv'd, is to let every Row
or
Courſe of Stone throughout the Wall be
even
and equally proportion'd, not patch'd up
of
great Stones on the right Hand and little
ones
on the left; becauſe we are told that the
Wall
by the Addition of any new Weight is
ſqueezed
cloſer together, and the Mortar in
drying
is hinder'd by this Preſſure from taking
due
hold, which muſt of Courſe make Cracks
and
Defects in the Work.
But you may be
ſafely
allow'd to make the inward Shell, and
all
the Front of the Wall of that Side, of a
ſofter
and weaker Stone; but whatever Shell
you
make, whether inward or outward, it
muſt
be always perpendicular, and its Line
exactly
even.
Its Line muſt always anſwer
juſtly
to the Line of the Platform, ſo as not in
any
Part to ſwell out or ſink in, or to be
wavy
, or not exactly plum, and perfectly well
compacted
and finiſhed.
If you rough. Caſt
your
Wall as you build it, or while it is freſh,
whatever
Plaiſtering or Whitening you do it
over
with afterwards will laſt, in a Manner, for
ever
.
There are two Sorts of Stuffing; the
one
is that with which we fill the Hollow that
is
left between the two Shells, conſiſting of
Mortar
and broken Fragments of Stone thrown
in
together without any Order; the other con­
ſiſting
of ordinary rough Stone, with which
we
may be ſaid rather to wall than only to fill
up
.
Both plainly appears to have been in­
vented
by good-husbandry, becauſe any ſmall
Coarſe
Stuff is uſed in this Kind of Work.
But if there was Plenty of large ſquare Stone
eaſily
to be had, who I wonder, would chooſe
to
make Uſe of ſmall Fragments?
And indeed
herein
alone the Ribs of the Wall differ from
what
we call the Finiſhing, that between the
two
Shells of this latter we ſtuff in coarſe Rub­
biſh
or broken Pieces that come to Hand;
whereas
, in the Former we admit very ſew
or
no unequal Stones, but make thoſe Parts of
the
Wall quite through, of what we have
call
'd the ordinary Sort of Work. If I were to
chooſe
, I would have the Wall throughout
made
of nothing but regularCourſes of ſquared
Stone
, that it might be as laſting as poſſible;
but
whatever hollow you leave between the
Shells
to be filled up with Rubbiſh, you ſhould
take
Care to let the Courſes of each Side be
as
even as poſſible and it will be proper be­
ſides
to lay a good many large Stones, at con­
venient
Diſtances, that may go quite through
the
Wall to both Shells, in order to bind and
gird
them together, that the Rubbiſh you
ſtuff
them with may not burſt them out.
The Ancients made it a Rule in ſtuffing their
Walls
, not to continue the Stuffing uninterrup­
ted
to the Heigth of above five Foot, and then
they
laid over it a Courſe of whole Stone.
This
faſten
'd and bound the Wall, as it were, with
Nerves
and Ligaments; ſo that if any Part of
the
Stuffing, either through the Fault of the
Workman
, or by Accident, happen'd to ſink,
it
could not pull every Thing elſe along with
it
, but the Weight above had in a Manner
a
new Baſis to reſt upon.
Laſtly, we are
taught
what I find conſtantly obſerved
among
the Ancients, never to admit any Stone
among
our Stuffing that weighs above a Pound,
becauſe
they ſuppoſe that ſmall ones unite
more
eaſily, and knit bettter with the Cement
than
large ones.

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