Walthamstow sundial outside underground station (very accurate with nearby correcting graph) https://t.co/7DDvNXhJ5J
— Maurizio Morabito (@omnologos) September 19, 2020
from Twitter https://twitter.com/omnologos
Walthamstow sundial outside underground station (very accurate with nearby correcting graph) https://t.co/7DDvNXhJ5J
— Maurizio Morabito (@omnologos) September 19, 2020
from Twitter https://twitter.com/omnologos