How presser-feet work, third edition
This is the third edition of “Domestic Sewing Machine Presser-Feet”.
Although there are many explanations of how to use presser-feet and attachments, I have found no information about how they work. This article is a detailed explanation of the walking, tuck-marker, zig-zag, buttonhole and ruffler attachments.
In addition, there is an examination of early (up to about 1915) Singer style sets, which are often in "puzzle" boxes.
I had to split the file into three parts to upload it.