1886 Ph.B. degree from Baldwin College.
1889 M.A. degree from Baldwin College.
1890 D.Sc. degree from Princeton.
1899 Appointed trustee of Baldwin-Wallace college. Chairman of the Board from 1936.
1903 Publication of LABORATORY PHYSICS.
1908 Publication of THE FLUTE AND FLUTE-PLAYING.
1914 Lowell Institute lectures, SOUND ANALYSIS.
1916 Publication of THE SCIENCE OF MUSICAL SOUNDS.
1917 Edward Longstreth medal for papers on "A 32-Element Harmonic Synthesizer" and The Henrici Analyzer and Devices for Extending and Facilitating its use."
1921 The Cleveland Museum of Art exhibit of the flute collection.
1921 Became a member of the National Academy of Sciences.
1924 Honorary degree D.Sc. from Miami University.
1925 Became president of American Physical Society.
1926 Elliott Cresson medal of the Franklin Institute for fundamental investigations in acoustics.
1926 American Association for the Advancement of Science Award; Kansas City.
1927 Honorary degree L.LD. from Western Reserve.
1927 Cleveland distinguished service medal.
1927 Los Angeles Flute Club Award; February 6th.
1927 Ambrose Swasey Chair of Physics at Case.
1927 Brownsea Castle Sale.
1927 Honorary degree D.Sc. from Dartmouth College.
1927 Museum of Peaceful Arts Exhibit; May 24th.
1928 New York Flute Club Award; February 26th.
1928 Wagner Free Institute of Science Lectures.
1929 Lecture, "The Science of Musical Sounds;" May 10th.
1931 Elected president of Acoustical Society of America.
1931 Elected member of the board of the Perkins Observatory, Ohio Weslyan.
1932 Lecture, "The Anecdotal Histroy of the Science of Sound;" November.
1933 Honorary degree L.LD. from Baldwin-Wallace College.
1935 Publication of THE ANECDOTAL HISTORY OF THE SCIENCE OF SOUND.
1935 Publication of bibliography, THE FLUTE.
1936 Honorary degree D.Eng. from Case University.
1937 Publication of SOUND WAVES: THEIR SHAPE AND SPEED.
1938 Elected vice-president of THE SOCIETY OF RECORDER PLAYERS.
1939 Publication of SPARKS, LIGHTNING, AND COSMIC RAYS.
1940 Honors from Case University; July.
National Academy of Sciences
The National Research Council
The American Philosophical Society
The American Academy of Arts and Sciences
The Cleveland Engineering Society
American Institute of Physics
American Astronomical Society
American Mathematical Society
American Acoustical Society
American Meteorological Society
Optical Society of America
Seismological Society of America
Society for the Promotion of Engineering Education
American Musicological Society
American Guild of Organists