Does Anyone Know - how to check for copyright

Some of you know me as Felt Sew Crafty as well as Glorious Hats. My passion for vintage, retro and even current sewing patterns has resulted in a large personal collection as well as a search and share hobby business. Recently I've been listing to sell a few of the sewing resource books that have helped me along the sewing vintage path. As I scanned this one to list, it occurred to me that this is one that really ought to be available to everyone and instead of listing it to sell would like to scan it and put it up either in my flickr album or on my blog (or maybe both).

Any ideas on how one checks if it is legally permissible to copy and post this book? The copyright date is 1936, 1939, published by The Singer MFG. Co. I'll start by googleing Singer MFG Co. Thoughts to point me in the right direction will be very appreciated.

Thanks,
Jane