Plan of a Circular Building and a Spring Device
A round plan measured at 14 braccia, beside a spring-loaded mechanism on a stand
On blue prepared paper Leonardo lays out at upper left a circle with radial internal partitions, drawn as the plan of a round structure and annotated only with the dimension of fourteen braccia. At the right of the sheet is a vertical-framed mechanism carrying a coiled spring or spiral element, with further faint stand-like structures sketched below. The single transcribed note records the measurement of the circular plan; additional untranscribed drawing, but no further text, is present.
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Circular plan measured at fourteen braccia
At upper left a circle with radial internal partitions is set out as the plan of a round building. Its only annotation is the dimension of fourteen braccia, sizing the structure.
Spring-loaded mechanism on a vertical stand
At the right of the sheet a vertical-framed device is drawn, incorporating a coiled spring or spiral element mounted on a stand. No transcribed text accompanies this mechanism.