4/27/2024 0 Comments Sell sheets for manuscript![]() ![]() Īfter Gates acquired the codex, he had its pages scanned into digital image files, some of which were later distributed as screensaver and wallpaper files on a CD-ROM as part of a Microsoft Plus! for Windows 95 desktop theme, which would later be included with Windows 98 and Windows ME. Until 2021, the codex remained the most expensive book ever sold. The codex was sold to Bill Gates by Christie's auction house on 11 November 1994 in New York for US$30,802,500. Over the next seven years, Pedretti translated each page to English, completing the project in 1987. Hammer commissioned Leonardo da Vinci scholar Carlo Pedretti to compile the loose pages of the codex back into its original form. The codex was purchased at auction from the Leicester estate in 1980 by the wealthy industrialist and art collector Armand Hammer, for $5.1 million ($18.1 million in 2022) he later renamed the notebook the Codex Hammer. Thomas Coke, 1st Earl of Leicester (1719–1759). ![]() Guglielmo della Porta, Michelangelo's student (?).It was handwritten in Italian by Leonardo, using his characteristic mirror writing, and supported by copious drawings and diagrams. At one time the sheets were bound together, but they are now displayed separately. The codex consists of 18 sheets of paper, each folded in half and written on both sides, forming the complete 72-page document. Thus, he described the phenomenon of planetshine one hundred years before the German astronomer Johannes Kepler proved it. Leonardo explained that the pale glow on the dark portion of the crescent Moon is caused by sunlight reflected from the Earth. In this model, waves on the water's surface cause the light to be reflected in many directions, explaining why the Moon is not as bright as the Sun. Leonardo speculated that the Moon's surface is covered by water, reflecting the Sun's light. He made recommendations about bridge construction and erosion from his observations. Among other things, Leonardo wrote about the flow of water in rivers and how it is affected by different obstacles put in its way. ![]() This is the main topic of the Codex Leicester. Hundreds of years before plate tectonics became accepted scientific theory, Leonardo believed that mountains had previously formed sea beds, which were gradually lifted until they formed mountains.
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