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Contrail 1921
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Contrail 1921

"Cloud Formation from Supercharged Plane": passage from Monthly Weather Review describing an early instance of contrail formation from a supercharged aircraft. This may be the first known description of such phenomena.

Date
1921
Mapmaker / publisher
B. M. Varney
Archive
Wikimedia Commons
Type
map
Original size
582 × 653 pixels

Public domainsafest

Reason: its US copyright has expired (published before 1931).

Read from: Commons licence category: PD US expired; no CC BY, CC BY-SA, GFDL or deletion tag on the file page; permission field: Public domain, published before 1923.

Credit line

"Contrail 1921" (1921). B. M. Varney, via Wikimedia Commons. Public domain. https://commons.wikimedia.org/wiki/File:Contrail_1921.jpg

What public domain means here

Need maps for a whole project? Add Find Any Map to Claude and ask for this one by its id: 103033.

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