Experiment on the force of a blow with imprinted earth
A pivoted rod dropped to strike soft earth that records the impact, m n o
The verso continues the study of the blow (colpo) with a proposed experiment. Soft, prepared earth is to be imprinted so it records the quality of the impact at different points of the arc traced by a falling rod and at different points along the rod itself. The apparatus, drawn across the upper sheet, is a long rod pivoted on a stand at one end that swings through the arc; a small chute-shaped figure in the margin marks where the recording earth is imprinted.
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Measuring the blow in imprinted earth, m n o
The earth chosen to demonstrate the power of the blow must be imprinted, and with it one notes the quality of the impact at different places of the circle made by the rod's travel and at different places of the rod. The rod is tested fixed at one end, and again loosed at each end, falling like a club or simply without force. Labels m n o mark the setup.
Pivoted rod swinging through a traced arc
The upper drawing shows a long rod mounted on a stand at the left and swinging through a wide arc scored across the sheet, with a small weighted fitting near its far end. It is the mechanism by which the falling blow of the experiment is delivered and its path recorded.
Chute of earth that records the rod's blow
A chute-shaped figure in the margin marks the earth that is imprinted to serve the experiment of the blow of the depicted rod. It is where the impact leaves its measurable mark.