Old Forecasts, Graded
From the Earth to the Moon: Verne’s Gun, 22,000 g or More
Verne's 12,000 yards per second over a full 900-foot run averages about 22,000 g. We grade seven of his claims: the crew a hit, the gun a costume error.
Image credit
"From the Earth to the Moon (151481126)" by Henri de Montaut — https://commons.wikimedia.org/wiki/File:From_the_Earth_to_the_Moon_(151481126).jpg — Public domain in the US (published 1874) and in the EU (artist died 1900 at the latest, life+70; no engraver named on the plate, published more than 70 years ago); modified: cropped to 16:9 for the page and the card view, keeping the gun's mouth and the column of fire; the shell at the top of the plate, the upper smoke and the tiny figures at the foot are cut