Encyclopédie des enfans ou Abrégé de toutes les sciences à l'usage des jeunes personnes
A French children's encyclopedia of all the sciences, written by Jean Henri Samuel Formey and printed in 1787 by Jean Samuel Cailler for young readers. Its pictures are small, plain line diagrams of heraldic shields in black and white, with a question-and-answer layout; a designer could take from them the clean geometry of shield outlines and their hatching patterns for field divisions and tinctures.
