Instructions for Beseler tubes
Here is a link to the instruction sheet for the Beseler version of the tubes. They were designed for either colour or black and white paper. You load the paper into the tube under safelight, and then go through the development process in room light.
Originally Posted by clothesontheline
The rotary agitators are motors that rotate the tubes for you (to ensure the chemicals are evenly spread over the paper, and don't exhaust). The link shows how you can do this as well by hand: http://mikecnichols.com/beseler/Bese...uctions%5D.pdf