Misc: What was the name of Wagner's last Opera, first performed in 1882?

Questions

Nicolas Appert, inventor of food canning, bouillon tablet, born.?

Slaves revolt in Haiti (later suppressed).?

Robert Bridges, poet laureate of England (The Testament of Beauty), born.?

Felix Bloch, U.S. physicist (Nobel 1952), born.?

Karl Jansky, discoverer of cosmic radio emissions in 1932, born.?