River scouring, gravel deposition, and a foundation figure
Current down mid-river scours deep; coarse gravel stays in the strongest flow; a pavilion detail.
In red chalk the sheet mixes river hydraulics with two structural sketches. A note on the current explains that where the flow runs down the middle of a full river the mound is not spared between the back-eddy and the current but is scoured entirely deep, while coarse gravel remains in the stronger current. At the upper right a foundation is drawn with two cross-marks, and at the right a small pavilion detail carries the word 'inside'.
On this page
Current, back-eddy and scouring of the bed
The note reasons that where the current runs down the middle of a full river, the mound does not survive between the meeting of the back-eddy and the current; instead the bed there is scoured entirely deep.
Coarse gravel stays in the strongest flow
A heaped gravel bar is drawn in the river. The note states that the coarse gravel remains in the greater current.
Foundation figure with two crosses
At the upper right a foundation is sketched with two cross-marks, captioned in the bundle as a figure of a foundation. It sits among the river studies, suggesting a work founded in flowing water.
Detail of a pavilion
A small pavilion, or tent, is drawn at the right of the sheet. The single transcribed word set on it reads 'inside' (dentro).