I was wondering if anyone could help me with the diagram below, which is from Updike's Printing Types
I didn't recognize the little linear glyphs on the far right.
Does anyone know what they are?
Also, I didn't understand the marks below the 2 Em and 3 Em labels.
Does this refer to dashes?
I didn't know if the wavy characters were for wave-ornaments of some kind?
If anyone has information, I would be very grateful!