Blank verso of two fragments with show-through
Curatorial note: both fragments invisible before restoration, without writing or drawing
The source marks both mounted fragments, (a) and (b), as invisible before restoration and without writing or drawing of their own on this side. What can be seen is faint show-through from the recto, where the pump, two-tube machine and other mechanical sketches were drawn. No autograph text is present on this face.
On this page
Show-through of the recto's mechanical sketches
The source records both fragments as blank on this side. Only faint offset from the recto shows through, giving ghostly outlines of the pump, the two-tube machine and folding frameworks drawn on the other face.