| Birth | 13 Mar 1866 | Strongsville, Cuyahoga County, Ohio | | | |
| Residence | Jul 1870 | Strongsville, Cuyahoga County, Ohio | | | |
| Religion | | attended the German Methodist School every Sunday - Berea, Cuyahoga County, Ohio | | | |
| Residence | 1874 | with his parents - Berea, Cuyahoga County, Ohio | | | |
| Miscellaneous | | was the chief of the Bera Hook and Ladder Company No. 2 as a teenager - Berea, Cuyahoga County, Ohio | | | |
| Education | 1880 | in the Berea Public Schools until he was fourteen - Berea, Cuyahoga County, Ohio | | | |
| Miscellaneous | 1880 | took the district exam for a teacher's certificate and passed with highest grades, but did not teach - Berea, Cuyahoga County, Ohio | | | |
| Education | 1880 | in the preparatory school of Baldwin University - Berea, Cuyahoga County, Ohio | | | |
| Graduated | 18 Jun 1886 | Baldwin University with a PhD degree & played a flute solo and gave a lecture at the graduation - Berea, Cuyahoga County, Ohio | | | |
| Occupation | Aft Jun 1886 | assistant cashier in the Berea National Bank - Berea, Cuyahoga County, Ohio | | | |
| Education | Sep 1887 | at Princeton as a graduate student majoring in astronomy - Princeton, Mercer County, New Jersey | | | |
| Occupation | Jun 1888 | returned to Baldwin University as a professor of natural science - Berea, Cuyahoga County, Ohio | | | |
| Graduated | 1889 | Baldwin University with his A.M. degree - Berea, Cuyahoga County, Ohio | | | |
| Graduated | Jun 1890 | Princeton with his D.Sc degree - Princeton, Mercer County, New Jersey | | | |
| Marriage | 28 Jun 1893 | Princeton, Mercer County, New Jersey - Edith Caroline EASTON | | | |
| Occupation | 1893 | assistant professor of Physics at Case Western Reserve University - Cleveland, Cuyahoga County, Ohio | | | |
| Occupation | 1895 | physics department chairman at Case University - Cleveland, Cuyahoga County, Ohio | | | |
| Occupation | Abt 1920 | professor at Case School of Applied Science - Cleveland, Cuyahoga County, Ohio | | | |
| Miscellaneous | 1929 | Founding member and second president, Acoustical Society of America | | | |
| Residence | 1940 | 10838 Deering, Cleveland, Cuyahoga County, Ohio | | | |
| Death | 22 Feb 1941 | Cleveland, Cuyahoga County, Ohio | | | |
| Burial | Aft 23 Feb 1941 | Lakeview Cemetery, Cleveland, Ohio, Cleveland, Cuyahoga County, Ohio | | | |