Madam C.J. Walker

We were watching Antique's Roadshow (as one does), when a copy of "Text Book of the Madam C.J. Walker Schools of Beauty Culture" (1928) came on.

http://www.pbs.org/wgbh/roadshow/archive/201307A06.html
http://www.pbs.org/wgbh/roadshow/fts/kansascity_201307A06.html

They showed this image in the book, which caught my eye: "Bobbed Hair Types"

The story of Madame C.J. Walker is fascinating. Born Sarah Breedlove, Madame Walker was known as the first female self-made millionaire in America. She developed many beauty products for African-American women and trained "beauty culturists." She is often miscredited with the invention of the hot comb, which was used earlier in France in the 1800s, however she received a patent for a version with widened teeth.

Further reading by Henry Louis Gates. 

http://www.pbs.org/wnet/african-americans-many-rivers-to-cross/history/100-amazing-facts/madam-walker-the-first-black-american-woman-to-be-a-self-made-millionaire/

(Totally random side note: I met him on a plane once and he was one of the nicest and most interesting people.)