Source: Wikimedia Commons
In 1964 a classroom depended entirely on one writing surface, and that surface only worked if the felt blocks used to clear it were emptied regularly. The…
Source: Wikimedia Commons
In 1962 classroom windows were set high in the wall on purpose, well above where any child could get to them, which meant a room of thirty people…
Source: Wikimedia Commons
In 1970 the entire relationship between a household and a school was conducted in about five minutes, once a year, in the evening, with a queue outside…
Source: Wikimedia Commons
These were machines built to beat a single bottleneck, and they look absurd until you count.
Preserving fruit in quantity means processing hundreds of individual pieces one at…
Source: Wikimedia
The box of old jars in my family came with a paper bag of perished rubber rings, flat and cracked and completely useless, and I threw them out before…
Source: Wikimedia Commons
The crank freezer in my grandparents' cellar was a wooden bucket with a metal can inside it and a gearbox on top, and the part nobody could ever…