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Riou, Stephen
The Grecian orders of architecture: delineated and explained from the antiquities of Athens ; also the parallels of the orders of Palladio, Scamozzi and Vignola — London, 1768

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https://doi.org/10.11588/diglit.1670#0044
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os Arcbite&ure. 21
The («), Systyle placed the columns at two diameters distant;
The (J>) Diastyle sixed columns at an interval of three diameters.
The sourth was called (c) Arajostyle, and the columns were disposed with an interval of sour dia-
meters. In this intercolumniation they were obliged to make the architraves of wooden beams;
therefore, because of the disHculty of executing it in stone, and the ill appearance so great a
di siance between the columns produced, it was never approved.
The (//) Eustyle surpasTeth all others, on which account it was thus named. The intercolumni-
ation herein given is two diameters and one fourth, observing however that the middle interco-
lumniation in the sore and back fronts, was allowed three diameters, to allow a freer access to the
door way.
But the height (<?) of columns, as well as their diameters, is to be considered in intercolumnia-
tions. To the (_/") narrowest intervals are placed the molt ssender columns, and to the wider open-
ings, the tbickest and Ihortest columns : yet thesc rules have always had their exceptions ; the Ionic
and Corinthian columns having been disposed in mod works with as wide intervals as the Doric;
and this again has been placed with the narrow intervals suitable to both the former modes: when
one order is placed above another, the uppermost has its intercolumniation wider than the inferior
one. The practice, recommended by Vitruvius, is as follows.
For the araostylt'i let the height of the columns not exceed eight times its diameter. This is
applicable to the Doric.
For the diastyle and eustyle, the height os the columns is allowed eight diameters and a
half. This may iiiit the Ionic.

(<7) Hitc utraque genera (pycnostylos S; systylos) vkiosum habent usum, matres enim samiliarum cum ad supplicationem
ascendunt, noci possunt par intercolumnia amplcxse adire, nisi ordines feccrinr. Item'valvarum aspc&us obstrukur columnarum,
crcbrkatc, ipsa que sigua obseurantur. . Item circa a:dem propter angustias, impediuntur ambulatiories. Lib. III. c. 2.
(5) Hrec dispositio hanc habet difficultatem, quod epistylia propter intcrvailorum magnitudinem sranguntur. Lib. III. c. 2.
(() In arjcostylis autcm nee lapideis nee marmoris epistylits uti datur sed imponendas de materia trabes perpetuus; & tpfarum
sedium species sunt baryc:e, baricephalx, humilcs, latse. Lib. III. c. 2.

((/) Euilyli ratio qua: maxime probabilis & ad usum & ad speciem & ad firmitatem rationes habet explic
bit & figurations asfectum venustum & aditus usum sine impedttionibus, & circa ccll.im ambulatio autorita

—sie enim habe-
Lib. III. c. 2.

(?) Ita ex ea divisione intercolumnia, akitudinesque col'

m habebunt justam raiionem. Lib. III. c. 2.

s/*) Quemadmodum enim crescunt spatia inter columnas, ita proponionibus adaugenda: sunt crassiiadines scanorum. Nam-
nue si in aricossylo, nona aut dec!ma pars crassitudinis suerit, tenuis & exilis apparebit. Idco quod per laikudinem imcrcolumnio-
rum teer consumk & imminuit aspeclus scaporum crassitudincm. Contra veio pyenostylis si oilava pars ciailiiudinis suerit, prop-
ter crcbitatem & angustias intercolumniorum, tumid.im & invcnuslam efficiet speciem. Itaque generis operls oportet perlequi
sytntueirlas. Etiamquc angulares columna: crassiores saciendre ex suo diametro quinquagelima parte, quod e;e ub aere circum-
duntur & graciliores videntur aspieicmibus. Ergo quod oculos sallit, ratio.cinauone e(t exequendum- Contractutx autcm -in
summis columnarum hypotracheliis ita sacienda videntur, uti si columna sit ab minimo ad pedes quinos deuos ima eralJitudo di-
vidatur in partes sex S: earum partium quinque summa constituatm*. Item qua; eric ab quindecim pedibus ad pedes viginci, !'ca-
pu&itnus in partes sex & scrnissern dividatur, ex earumque partium quinque & semisse superior crassitudo columna; siat. Item qua;
erii a pedLbus viginti ad pedes triginta scapui imus dividatur in partes scplem eaiumque sex suinma contraiiura perficiatur. Qux
autetn ab triginta ad quadraginta altas, ima ctassitudo dividatur in panes I'eptcm & dimidiam, ex bis sex & dimidiam in suraojo
hatwat contracturaE ratione. Qiie eruut a XL ad L item dividem-as sunt in octo partes & carum septcm in suoiuao Icapi hypo-
tracheli > contrahaniur. Item si qux akiores erunt his cadem latione pro rata constituantur comr-tiTlura;. Has Butem propter
aLtitudinis intervallum scandentis oeuli speciem fallunt; quamobrem crnssitudinibus temperature. Venullatem enim persvqui-
turvisus; cujus si non blaudtmur voluptati pro ratione li modulorum adjestionibus, uii id in quo s.illimr tetnpenuiaoe irJuugea-
tur, vascus & invenustus conspicientibus remittetur aspe£tus. De aJjectione qua; adjicitur in inediis columnis qua; a pud Gra-
ces en talis appcllatur, in exttemo hbro erit sormaU ratio ejus, quemadmodum mollis S; conveniens efficiatur, Lib. III. c, 1.
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