Spring-and-Gear Mechanism with Squaring Sums
A framed device with paired springs and a toothed wheel, beside short arithmetic
The sheet is dominated by a tall mechanical drawing: two vertical coiled springs held in arched supports act on a large toothed wheel mounted within a rectangular frame. In the upper corner Leonardo sets out short arithmetical operations, squaring 45 to give 2025 and 44 to give 1936, beside the number 150. The machine itself is not covered by the page's transcription.
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Spring-driven toothed wheel in a frame
A tall device fills the sheet: two vertical coiled springs held in arched supports bear on a large toothed wheel set within a rectangular frame. The mechanism is drawn in detail but is not included in the page's transcription.
Squaring of 45 and 44
Columns of figures work through multiplications, giving 45 x 45 = 2025 and 44 x 44 = 1936 alongside the number 150. The sums sit apart from the machine as a separate calculation.