Fig. 3 / Fig. 4 - New system to navigate through the air

Illustration from the manuscript of Santiago de Cárdenas (Callao, 1726 - Lima, 1766), a Peruvian inventor considered a precursor of aeronautics and ornithology in Peru.
The document presents the author's studies and observations about the anatomy and flight of birds, from which he postulates the possibility of human flight through the construction of a sophisticated machine.
In particular, we observe the drawing of two animals: the first is a bird -condor- with a reptile -serpent- in its mouth; the second drawing is a bird -condor- standing on a surface.