 Ampt was also a proponent of the constructed language Volapük, and was one of the two American delegates to the 1889 international Volapük convention in Paris.He died on December 16, 1909 in Cincinnati, Ohio.Upon his death, it was revealed that Ampt had bequeathed nearly his entire estate (worth $150,000 in 1909 money) to the city of Cincinnati, to sponsor free public concerts; these concerts were still taking place as of 2012.