Marble Run on YouTube
michael42er has uploaded this splendid video featuring the Marble Run
Blog entries
Peaucellier – the straightest line
Invented in 1864 the Peaucellier linkage (poo-selli-yeah) linkage was created
Stickman, black and white
Layout done, parts cut out and assembled, photography complete. Tomorrow
Bridge structure and mysterious arches
Friend of the blog, Smelter, sent me this picture of
