Two mountains rising from the earth's circumference
A large circle of the globe with projecting peaks, plus number series marked 'equal'
The upper sheet is filled by a large circle standing for the earth, from whose circumference two mountains project outward. Below it are jotted numbers, including the series 2 3 4 twice, the figures 9 and 5, and the word 'equal'. The diagram and figures continue the notebook's proportional study of heights measured against the curved body of the earth.
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Circle of the earth with two projecting mountains
A large freehand circle represents the globe, and two mountains are shown standing out from its circumference. The figure treats the earth's outline geometrically so that heights can be compared. No prose accompanies the drawing.
Number series with the term 'equal'
Beneath the circle the figures 9 and 5 appear with the series 2 3 4 written twice and the note 'equal' beside a 5. They read as a proportional comparison of quantities rather than a finished calculation. The numbers link to the measured heights above.
Mountains standing on the body of the earth
The two peaks projecting from the earth's rim treat the mountains as features of the earth's body rather than as scenery. They are set out for measurement against the globe's curvature. The idea belongs with Leonardo's interest in the form of the earth.