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Rules and Examples of Perspective proper for Painters and Architects, etc.

Figura Octogesimasexta.

John James translation

Horizontalis projectio columnæ.

Illustration from Rules and Examples of Perspective proper for Painters and Architects, etc. In English and Latin: Containing a most easie and expeditious method to delineate in perspective all designs relating to architecture

Postquam sigillatim descripsimus mutulum, stylobatam, columnam & coronicem, omnia ista conjungere placuit: ita clariùs apparebit quomodo disponere oporteat delineationes geometricas, ut ex iis eruantur projectiones horizontales.

Linea plani est CD, perpendicularis CI. In A est elevatio geometrica longitudinis columnæ, (supponimus columnam delineari veluti jacentem humi.) In B ejus vestigium geometricum, cum divisionibus latitudinis in lineâ ER. Puncta longitudinis transferentur in lineam plani CG, puncta altitudinis EC transferentur in CF, ducendo rectas ex divisionibus CG ad punctum distantiæ, ex divisionibus CF ad punctum oculi. Per sectiones verò visualis CO erigentur perpendicula, & complebitur elevatio H, ex quâ eruetur columna nitida L.

Si super vestigio M formare placeat aliam columnam, ejus latitudines accipiendæ sunt ex columna B; ac sectio projicienda est in N, ut ex hac tamquam ex elevatione eruatur columna P. Si aliam columnam in angulo addere libitum fuerit, ope sectionum HN facilè illam complebis.

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