_Hupfeld._--Can any correspondent of "N. & Q." tell me where I can see
Hupfeld, _Von der Natur und den Arten der Sprachlaute_, which is quoted by
several German authors? It appeared in Jahn's _Jahrb. der Philol. und
Paed._, 1829. If no correspondent can refer me to any place where the paper
can be seen in London, perhaps they can direct me to some account of its
substance in some English publication.