A bibliophile teacher has lead his classes through the process of making hectographs, a gelatin printing process, and has put the instructions for this on the web. Basic process is make smooth gelatin sheet, make an ink laden master, put master on gelatin allowing ink to seep in, remove, apply paper and get print. Fun.
dead link: http://english.boisestate.edu/ttrusky/hecto.html
I found this site looking for information about magic lantern optics. Besides having a page devoted to that topic, it has a fair sized gallery of slide images, information about various types of lantern, slide restoration tips, resources and links, etc.
dead link: http://www.magiclantern14.btinternet.co.uk/contents.htm
A photoblog with weekly pictures of tools (mostly) presented as identification puzzles. Many are old or obscure (a number of typewriter assembly and adjustment tools, for example), some are common but closely cropped or only one part is shown.
One man's (Phil Agre's) commentary on inexpensive disposable pens. No pictures, just text. It would be nice to have reference pictures of the pens, but oh well.
dead link: http://polaris.gseis.ucla.edu/pagre/pens.html
qz thoughts