After looking at the top of the skirt last week, let us look at the bottom this week. This includes both the shape and the construction.
This skirt, which is a 3/4 turn view meaning she is slightly turned to the side, shows the bell shape through the bottom of the skirt. In the front, left, you can see a hint of what might be the hem tape.
This working class mom (those are the feet of her sons on either side of her) has a solid color skirt, likely wool, which shows the hem tape nicely. 
This well tucked wool skirt shows the hem tape. The bell shape is nicely defined. See how the skirt’s bell shapes from about her lower calf down?
This skirt shows more of the bell on the left hand side than the right. But, what I find interesting (in addition to the panel seams) is the wear evident at the bottom. 
This image is harder to see due the the coloring and scan. The skirt does have a nice bell shape. 
If I Had My Own Blue Box: 
Wow, these posts are so cool! They have me looking at old family pictures like (http://www.flickr.com/photos/60027918@N02/5933137488/in/set-72157626978597281) and (http://www.flickr.com/photos/60027918@N02/5933119850/in/set-72157627059266711). I hope you don’t mind the links! I love reading blogs like yours to help me understand how my ancestors dressed and what I can learn about their economic status based on it. Thank you so much for sharing all this information!