British Library
British Library: The Leonardo Notebook
Page through one of Leonardo's notebooks, in which he works out his observations about weights, measures, reflections, and similar material matters. Interesting examples of the master's characteristic "mirror writing" and of his...
Other
University of the Arts, London: Manuscripts at Universal Leonardo
This gallery of 22 excerpts from Leonardo's notebooks is accompanied by historical information and links to additional explorations of his interests in the forces of nature, light and vision, and imagination and invention. The drawings...