A sphere unfolded into six triangles, among machine sketches
A dark working sheet of mostly untranscribed figures and numeric calculations.
This very dark transmitted-light spread is almost entirely figures and numeric calculations, of which only one caption is transcribed. On 180r a labelled figure shows a b c d as the unfolded net of a sphere built from six triangles. The facing leaf 177v carries faint, untranscribed sketches - among them a long curved tube or rod at the upper left, stepped forms, and slotted bracket-like fittings near the foot - together with numeric jottings not given here.
On this page
The net of a sphere laid out as six triangles
A small labelled figure sets out a b c d as the 'spoglia' - the unfolded net or development - of a sphere formed from six triangles. It is the only passage transcribed from an otherwise figure-and-number sheet.
Faint mechanical sketches across the sheet
Beyond the transcribed caption the sheet is crowded with faint, untranscribed drawings. Visible among them are a long curved tube or rod at the upper left, stepped forms lower down, and slotted bracket-like fittings toward the foot of the left leaf, alongside numeric calculations that are not given here.