Pantography, or Universal drawings, in the comparison of their natural and arbitrary laws, with the nature and importance of pasigraphy, as the science of letters; being particularly adapted to the orthoepic accuracy requisite in international correspondences, and the study of foreign languages. With specimens of more than fifty different alphabets, including a concise description of almost all others known generally throughout the world.

Mode of access: Internet.

L'idéographie : mémoire sur la possibilité et la facilité de former une écriture générale au moyen de laquelle tous les peuples puissent s'entendre mutuellement sans que les uns connaissent la langue des autres /

"Extrait du vocabulaire français-idéographique et idéographique-français": 14 p. (3rd group).