Elastic lath to launch three arrows; Latin words
A sprung launching lath and a question on where its blow strikes hardest
The upper margin continues a Latin word-list (quousque, omissis, alioquin, disces and more) with Italian meanings. The main study is a pen drawing of a curved, hatched elastic lath sprung against an upright post — a mechanism meant to launch three arrows, shown as lines radiating from its head. Beside it a note poses a physics question: where along the striking beam is its blow greatest.
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Where the striking beam delivers its greatest blow
Leonardo asks where the beam that strikes will give its greatest percussion: in the middle of its width, at the ends of that width, in the middle of its height, or at the two ends of its length. The figures 5, 10 and 5 label the proportions of the beam.
Elastic lath for launching three arrows
A curved wooden lath, rendered with hatching, is drawn bent against an upright post. Three lines spring from its head, the arrows it is designed to shoot. The device is a sprung launcher rather than a bow.
Latin adverbs and verbs glossed in Italian
The top of the sheet lists Latin words with Italian meanings: quousque (until), omissis (leaving aside), alioquin (otherwise), disces (you will learn), pretermittente (letting go), and crebrius (more often).