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Go CAMP INVENTION
If you study various subjects for a lifetime you cannot possibly keep everything in your head.
Through a mirror's reflection
He used mirror writing.
Leonardo DA Vinci recorded his notes backwards so he could see them in the mirror.
Leonardo da Vinci wrote most of his personal notes in mirror writing. Most of his notebooks were written in mirror writing.
He wrote over 5,000 worth of notes and many are still around. So, any quotes are taken from his notes.
Leonardo da Vinci, the famous Italian inventor, artist, and scientist, was known to write his notes in mirror writing. This unique style of writing was a way for him to keep his notes private and prevent others from easily reading his works.
Amerack
he took a lot of notes (many of which are today public), but did not publish anything.
Leonardo da Vinci didn't build anything but if, in the Renaissance, they had any the right tools and machines, he probably would have. Leonardo did design a bridge in his notes, that was designed so well, if it had been built it would hold todays heavy traffic.
Go to their website and take notes according to that