Svaret på gårdagens lucka ska vara Arkimedesskruv, arkimedes och 200-talet fKr.
Till skillnad från konstbevattning där man leder vattnet i kanaler så används skruven till att föra vattnet från en lägre punkt till en högre punkt, tex en platå.
Rätt svar på lucka 22
Tävling Posted on lör, december 23, 2017 19:02:55- Kommentarer(2) https://julkalendern.boaberg.se/?p=75
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