RICHARD GERSTL (1883–1908), Self-Portrait in front of a Stove, 1907. Oil on canvas on board. Neue Galerie New York Modern Worlds: Austrian and German Art, 1890-1940 Renée Price (ed.), Prestel/Neue Galerie, 2021, 656pp, $75/£55 ALEXANDER ADAMS is transported to a thrilling time of artistic experimentation The Neue Galerie in New York holds one of the world’s…