Facade windows, an ornate portal and a lever
How windows read open and shut, a main door, an open window, and a beam raised by a lever
The sheet studies the openings of a facade. A facade section sets the windows and the intervening solids equal in width, with a lattice screen (gelosia), and a note explains how, seen from outside, the arched window-heads read as two half-niches that combine into one whole niche whether the windows are open or shut, provided the pier between them equals a window's width. An ornate 'main door' and an open arched window with its plan and footing are drawn, together with a column capital. At the top a beam is levered up from a low trestle, shown with a separate detail of the lever.
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Facade section with equal windows and solids
A section of a facade sets the windows and the spaces between them equal, each as wide as the other, and includes a lattice screen (gelosia). The rhythm of solid and void is thus kept regular.
How arched windows read open and shut
When the windows are shut, from outside the house the two half-niches over the window-heads appear as one whole niche. When they are open, if the pier between two windows equals a window's width, the upright showing likewise inside makes the two half-niches again compose one whole niche.
Ornate main portal
An ornamented doorway is labeled the main door (porta principale). It is crowned with a scrolled entablature over a fan-lit arch.
Open window with plan and footing
An open arched window is drawn with its plan, and its base is noted as the footing (fondamento) of a window. The plan shows how the jambs and arch sit on the wall.
Beam raised from a trestle by a lever
At the top of the sheet a heavy beam is levered up off a low trestle, with a separate detail of the lever working over its fulcrum. The notebook supplies only a caption for this mechanical study.