1868 introductions

signalling device to control competing flows of traffic

Japanese era from October 1868 to July 1912

apple cultivar that produces cooking apples which are also sour eating apples

fluid instability that occurs when there is velocity shear in a single continuous fluid or a velocity difference across the interface between two fluids

Universalglot is an a posteriori international auxiliary language published by the French linguist Jean Pirro in 1868 in ''Tentative d'une langue universelle, Enseignement, grammaire, vocabulaire''. Preceding Volapük by a decade and Esperanto by nearly 20 years, Universalglot has been called the first "complete auxiliary-language system based on the common elements in national languages". Pirro gave it more than 7,000 basic words and numerous prefixes, enabling the development of a very extensible vocabulary.