Antoni Grabowski(born 11 June 1857) was a Russian chemical engineer who  worked as a practical chemical engineer in Zawiercie and was known for a multitude of inventions and technological innovations and  made an influential impact on the development of Esperanto into a language of literature.
Antoni Grabowski(born 11 June 1857) was a Russian chemical engineer who  worked as a practical chemical engineer in Zawiercie and was known for a multitude of inventions and technological innovations and  made an influential impact on the development of Esperanto into a language of literature.