This evening I read through the sewing machine repair manual chapter to do with the adjustments on my machine. There are two or three possible adjustments and one possible repair (replacing parts this old could be difficult). Instead of tackling it tonight I will read through this chapter several times over the next few days, and give it time to sink in before I take screwdriver to machine. I'm also going to put the book into my tablet so I can enlarge the photos of the illustrations (they printed out rather flat with not as much detail as before).

It turns out that this book may have a more detailed origin the book is "a condensation of a home study course currently under consideration by the Job Corps for inclusion in their curriculum." Researching the Job Corps program is a huge longshot, but it would be interesting to know what was contained in that course. The introduction is typically sexist, talking about women who have machines they don't understand, and men learning to repair them.