How to draw on a blackboard: beautiful tips from 1909

A lovely book “by Massachusetts based artist and teacher Frederik Whitney (1858-1949) on the lost art of blackboard drawing”. “Ability to draw easily and well on the blackboard is a power which every teacher of children covets. Such drawing is a language which never fails to hold attention and awaken delighted interest”. Via Public Domain Review . […]

A comeback for pneumatic tubes

I kinda love this idea. The Economist reported recently on the concept of using pneumatic pipes to deliver goods. “In the late 19th and early 20th century, underground tubes were used in many cities to speed up the transport of mail between post offices and government buildings. “Letters were put into capsules, the capsules into […]