616 Notes on Relation Between Weight and Force 
1505 
Pen and ink, 213 x 154 mm 
Turin, Biblioteca Reale, Treatise on the Flight of Birds, fol 4r

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617 Studies on Characterstics of Birds’ Wings 
1505 
Pen and ink, 213 x 154 mm 
Turin, Biblioteca Reale, Treatise on the Flight of Birds, fol 4v

593 Design for A Sharpnel Mortars with Explosive Shells 
c. 1495-1499 
Pen and ink and Indian ink, 
238 x 200 mm 
Mil, biblioteca Ambroisana 
Codex Atlanticus, fol. 33r/9v-a

592 Row of Four Mortars Firing Stones Into the Courtyard of a Fort 
c.Pen and ink and Indian ink 
329 x 480 mm 
Windsor Castle, royal Library 
(RL 12275r)

587 Sheets of Studies of Foot Soldiers and Horsemen in Combat, and Halberds 
c. 1485-1488 
Venice, Galleria dell’ Accademia

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588 Study of Halberds 
c. 1487-1490 
Pen and ink, 210 x 144 mm 
Paris, Bibliotheque de’ Institut de France, Codex Ashburnham 
1875/1 (MS B 2184), folio A.1

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589 Study of Halberds 
c. 1487-1490 
Pen and ink, 210 x 160 mm 
Paris, Bibliotheque de’ Institut de France, Codex Ashburnham 
1875/1 (MS B 2184), folio B.1

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580 Scythed Chariot 
c. 1483-1485 
Pen and ink, 210 x 290 mm 
Turin, Biblioteca Reale, 
Inv. 15583r

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581 Construction of a Bridge 
c. 1485-1488 
Pen and ink, 216 x 300 mm 
Milan, Bilioteca Ambrosiana 
Codex Atlanticus, fol. 55r/16v-a

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582 Military and Architectural Studies and Sketch of a Church (Florence Cathedral?) 
c. 1487-1488 or earlier 
Pen and ink, 288 x 208 and 228 x 214 mm 
Milan, Bilioteca Ambrosiana 
Codex Atlanticus, fol. 59 a-r/17v-a and 22r-a

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583 Study of a Swivelling Rope Bridge 
c. 1485-1490 
Pen and ink, 250 x 206 mm 
Milan, Bilioteca Ambrosiana 
Codex Atlanticus, fol. 855r/312r-a

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