Alberti, Leone Battista
,
Architecture
,
1755
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★
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Plate 2.
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(facing
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page 13)
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<
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>CHAP. XIII.</
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Of the Stair caſes, and their different Sorts, of the Steps of the Stairs which
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ought to be in odd Numbers, and how many. </
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<
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>Of the reſting Places, of the
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Tunnels for carrying away the Smoke. </
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>Of Pipes and Conduits for carrying
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off the Water, and of the proper Placing of Wells and Sinks.
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>The placing of the Stairs is a Work of
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ſuch Nicety, that without deliberate
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and mature Conſideration you can never place
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them well: For in a Stair-caſe there meet
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three Apertures: One, the Door by which you
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enter upon the Stairs; another, the Window
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that ſupplies you with Light to ſee the Steps
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by, and the third, the Opening in the Ceiling
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which lets you into the
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Area
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above; and
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therefore it is ſaid to be no Wonder, that the
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Stairs ſhould perplex the Deſign of a Structure;
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but let him that is deſirous to have the Stair
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not hinder him, take Caré not to hinder the
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Stair, but allow it a determinate and juſt Por
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tion of the Platform, in order to give its free
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Courſe quite up to the Covering at the Top
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of all. </
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>And do not let us repine that the
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Stair-caſe ſhould take up ſo much of the
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Area,
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for it furniſhes us with very many Conve
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niencies, and is no Inconvenience to the other
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Parts of the Building. </
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<
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>Add to this, that
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thoſe little Vaults and Spaces under the Stairs
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are very ſerviceable for a great many Purpoſes.
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>Our Stair-caſes therefore are of two Sorts (for
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as to thoſe Steps or Ladders which belong to
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military Expeditions, I ſhall not ſpeak of them
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here.) The firſt is that which has no Steps, but
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is mounted by a ſloping Aſcent, and the other
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is that which is mounted by Steps. </
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<
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>The An
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cients uſed to make the ſloping one as eaſy
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and as little ſteep as poſſible, and as I have
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obſerved from their Works, thought it a con
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venient Aſcent when the higheſt Part of its
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Perpendicular was raiſed one ſixth Part of the
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Line at Bottom. </
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>In making of Stair-caſes
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with Steps, they recommend the making of
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the Steps in odd Numbers, and eſpecially in
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their Temples: Becauſe they ſaid that by this
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Means we always ſet our right Foot into the
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Temple firſt; which was accounted a Point
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of Religion. </
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>And I have obſerved, that the
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beſt Architects never put above ſeven, or at
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moſt nine Steps together in one Flight; imita
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ting I ſuppoſe, the Number either of the
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Planets or of the Heavens; but at the End of
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theſe ſeven or nine Steps, they very conſider
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ately made a Plain, that ſuch as were weak or
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tired with the Fatigue of the Aſcent, might
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have Leiſure to reſt themſelves, and that if they
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ſhould chance to ſtumble, there might be a
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Place to break their Fall, and give them Means
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to recover themſelves. </
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>And I am thoroughly
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of Opinion, that the Stairs ought to be
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frequently interrupted by theſe landing Places,
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and that they ſhould be well lighted, and be
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ample and ſpacious according to the Dignity
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of the Place. </
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<
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>The Steps they never made
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higher than nine Inches, nor lower than fix,
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and in Breadth never leſs than a Foot and a
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half, nor more than a Yard, The fewer Stair
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caſes that are in a Houſe, and the leſs Room
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they take up, the more convenient they are
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eſteem'd. </
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>The Iſſues for Smoak and Water
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ought to be as direct as poſſible, and ſo built,
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that they may not lie and gather within, or
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ſoil, or offend, or endanger the Building For
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this Reaſon too the Tunnels of the Chimnies
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ſhould be carried quite clear from all Manner
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of Wood-work, for fear ſome Spark, or their
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meer Heat ſhould ſet Fire to the Beams or
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Rafters that are near them. </
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<
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>The Drains alſo
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for carrying off the Water ſhould be ſo con
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trived, as to convey away all Superſluities, and
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in their Paſſage not to do any Harm to the
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Houſe, either by ſapping or dirtying it. </
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<
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>For
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if any of theſe Things do Miſchief, let it be
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ever ſo little, yet by Length of Time and con
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tinuation, they will in the End be of the utmoſt
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ill Conſequence; and I have obſerved, that
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the beſt Architects have contrived either to
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throw off the Rain by Spouts, ſo as not to wet
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any body that is going into the Houſe, or car
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ried it thro Pipes into Ciſterns to ſerve for Uſe,
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or elſe brought it together to ſome Place
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where it might waſh away all the Filth, ſo that
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the Eyes and Noſes of the Inhabitants might
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not be offended with it. </
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<
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>Indeed they ſeem
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to have been particularly careful to throw the
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Rain Water clear away from the Building,
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that it might not ſap the Foundations, as well </
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