Note 18 — Front matter
Reading edition
The author is indebted to Mr. Don Berkebile of the Smithsonian's U.S. National Museum staff for his examination of the metal teeth on the comb plate of this machine.
Reading edition
The author is indebted to Mr. Don Berkebile of the Smithsonian's U.S. National Museum staff for his examination of the metal teeth on the comb plate of this machine.