I came across this great article from 1986 about adding an airlock door to your entry way the other day. https://books.google.com/books?id=NUzwukoJzGIC&pg=PA96

I came across this great article from 1986 about adding an airlock door to your entry way the other day. https://books.google.com/books?id=NUzwukoJzGIC&pg=PA96&source=gbs_toc_r&cad=2#v=onepage&q&f=true https://books.google.com/books?id=NUzwukoJzGIC&pg=PA96&sourc... Give it a read and realize the author is suggesting you repurpose other doors, and mismatched pieces and parts of larger windows to create an entry that looks like it’s off from a luxury home for $62. He assumes the reader knows how to cut and set glass, separate door frames, cut ellipses, and all sorts of little things that very few people today would have the skills or tools for. Read on and you’ll see that just by illustrating alternative designs the reader is meant to understand how to build it. It’s “Draw the rest of the owl” to us today, but it wasn’t then. This made me realize the great loss of practical knowledge that has been going on over the last 30-40 years.