Leonardo da Vinci was a painter besides above researcher. Leonardo's scientific work was based on empirical research, not scientific experiments or theoretical explanations: he tried to understand a phenomenon by describing in as much detail as possible and draw. Throughout his life he had planned to make a grand encyclopedia based on drawings.
The so-called Codex Leicester consists of 18 sheets of paper with red ink described reversed by Leonardo Da Vinci. The parchments affecting a range of ideas about include astrology and religion. Besides these codex are about 7000 sheets of the work of Leonardo known. Include Windsor Castle and libraries in Milan possess work of Leonardo (including the Codex Atlanticus, which is held in Milan). The most recently discovered codex is in two parts in Madrid.
Some of the drawings of Leonardo da Vinci by Revell (in wood) and by Italeri (in plastic) developed to model building boxes. This makes it possible for the drawings of Leonardo da Vinci to first build and above all experience whether they (had) to work.