I'm sure this will be an amusing read for many. Workshop Notes start on page 941. The rest is as good if interested in Historical Tech progress. Here is the link to the June 1940 issue-
That would be "Popular Mechanics" Shop Notes. They still turn up at flea markets this side of the pond (Canada) and Lee Valley did a reprint run of the whole lot some years ago. I have a bunch (of the originals) – still interesting and useful
"Practical Mechanics" was a UK publication (one of the F.J.Camm stable) certainly in the 50s/60s when I lived there – don't know when it ceased. I stll have both volumes of the "Practical Mechanics How to Make It Book" though.
Interesting reading about the refrigerator. I've always thought, even back when I was a little kid, that refrigerators should be made as chest types (like some freezers) instead of cabinet types where the door opens and all the cold air dumps out "every" time. But then it also occurred to me that if that were the case, then the power companies would loose revenue because the refrigerators would not be constantly cycling every time the "lid" was opened.
What was the name of that company again, General Electric ?
Trouble with chest refrigerators is you have to pile everything on top of everything else. Separate inner doors on each shelf could be the way to go for upright versions. Our -70 freezers have just that arrangement.