Imagine my surprise to discover that Archive.org has added a large collection of pulp magazines such as this August 1920 issue of Black Mask, the legendary mystery magazine that published so many hardboiled writers, including Dashiell Hammett, Raymond Chandler, Cornell Woolrich, etc.
The collection only has seven issues of Black Mask, including this August 1920, number.
The Pulp Magazine Archive’s main page is here.
However, there are a wide variety of other pulp detective magazines represented. Plus Weird Tales
And even an issue of Spicy Stories …
ladailymirror.com 
The cover artwork on these publications is incredible! What a find!
Looking forward to more, Thanks
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I have several issues of “Snappy Stories” from the 1920s–and they are indeed snappy!
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Here is an excellent site for online reading of old movie and pop-culture mags–I can spend HOURS herein: http://mediahistoryproject.org/#mc_signup
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A great resource…. I learned about it thanks to Mary Mallory.
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