Jim Emerson is creating a complete Futures Past: A Visual History of SF set, year by year. Vol. 3 is now available. And you can get Vol. 1 (1926) free from the website, as a PDF download.

It’s apparently set to be a complete survey of the output, people and occurrences (i.e. new words, sub-genres etc) for each and every year, with nothing left unmentioned.