of or pertaining to a
process for making copies of a document, from paper
having a prepared
gelatin surface to which the orginal writing has been transferred.
of or pertaining to a
process for making copies of a document, from paper
having a prepared
gelatin surface to which the orginal writing has been transferred. And he had a little hectograph book, and people keep getting copies of this book and reprinting it for themselves and giving it to their friends.