The temperature on January 6, 1869 was about 8.8 °C. The air pressure was 2 kgf/m2 and came mainly from the west-southwest. The airpressure was 77 cm mercury. The atmospheric humidity was 81%. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Pieter C. Bismeijer, "Bißmeyer-Bissmeyer-Bismeyer-Bismeijer Family", database, Genealogy Online (https://www.genealogieonline.nl/bismeijer-family/I84876.php : accessed March 31, 2023), "Gerrit Ponsteen (1869-1872)".
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