Notes:
Data source is "The Mumma Family" by Samuel H. Mumma 1962 & Moomaw book 1990
1910 Census, PA, Cumberland Co., Mechanisburg Burough, ED 23, dwelling 29, 24 Locust Street
Harnish, John T., head, 47, m1 10 yrs, b: PA/PA/PA, laborer feed store
" , Emma, wife, 45, m1 10 yrs, 2 children, 1 living, b: PA/PA/PA
" , Jacob M., 4, son, b: PA/PA/PA
1920 Census, PA, Cumberland Co., Mechanicsburg Burough, ED 23, dwelling 160, 24 West Locust Street
Harnish, John T., head, owns, 57, b: PA/PA/PA, labor feed warehouse
" , Emma, wife, 55, b: PA/PA/PA
" , Jacob M., son, 14, single, b: PA/PA/PA
" , Miller, Esther, boarder, 65, widowed, b: PA/PA/PA
1930 Census, PA, Cumberland Co., Mechanicsburg Borough, ED 21-23, dwelling 14, 24 W. Locust Street
Harnish, John T., head, owns, $2500, 67, 1st m: @ age 37, b: PA/PA/PA, laborer department store
" , Emma M., wife, 65, 1st m: @ age 35, b: PA/PA/PA
" , Jacob M., son, 24, single, b: PA/PA/PA