In the 1920's he invented a "Neo-Bechstein" piano which amplified sounds produced at low amplitudes.
In the 1920's he invented a "Neo-Bechstein" piano which amplified sounds produced at low amplitudes. He also developed a method for injecting nitrous oxide into automobile cylinders to assist travel uphill. With Fritz Haber he proposed using chemical agents as weapons during World  War I. FTP name this scientist most famous for his statement that chemical changes at absolute zero involve no change in entropy, or the third law of thermodynamics.
In the 1920's he invented a "Neo-Bechstein" piano which amplified sounds produced at low amplitudes.
Walter Hermann {Nernst}