In this Figure, I have made the Ground-line coincident with that of the Horizon, in which case the lower Plan can’t be seen, unless the Ground-line be sunk lower, as before intimated; or contrariwise, the Point of Sight rais’d higher, as I have here done, keeping it in the midst between the Ground-lines of the two Plans, that the Perspective of both might be equally distinct. In the Elevation, the second Column, which I mention’d to be hidden by the Wall, should be design’d with occult Lines.
Fig. lvii.
FIGURA Quinquagesimaseptima.
Adumbratio figuræ sequentis.
Figuram hanc seorsim delineavi, ut videas quomodo facienda sit operis totius adumbratio, accipiendo altitudines membrorum singulorum ex elevatione; latitudines & longitudines ex vestigiis. Quæ omnia ex diagrammatis inspectione clarissimè apparent.