Alexander Graham Bell's Delightfully Weird Sketchbooks

Alexander Graham Bell is best known for his work on the telephone, but that was far from his only interest. The Library of Congress preserved Bell's handwritten notes and sketchbooks for our perusal. They are filled with ideas and experiments, although the handwriting is, to put it kindly, sometimes hard to decipher. The Atlantic has a gallery of some of the more interesting sketches, like this airplane that resembles a Sierpinski triangle.

Link | The Alexander Graham Bell Family Papers -via Metafilter