[American Medical Directory, first edition, 1906, page 827, under 'Philadelphia, Pennsylvania']
[capital letters = member of state or county societies]
[Pa 2 = Jefferson Medical College, Philadelphia, Pennsylvania]
[the numbers in parentheses apparently represent the number of years of practice before the current law, and the year he received his state license]
[American Medical Directory, second edition, 1909, page 1015, under 'Philadelphia, Pennsylvania']
[capital letters = member of state or county societies]
[The symbol (a '+' inside a circle) indicates a member of the American Medical Association]
[Pa 2 = Jefferson Medical College, Philadelphia, Pennsylvania]
[the numbers in parentheses apparently represent the number of years of practice before the current law, and the year he received his state license]
HOUGHTON, CHAS. W [symbol]--Pa. 2 '92; (1 1881); (Royal); Broad and Girard Ave; 9-11, 2-3, 7-8
[American Medical Directory, third edition, 1912, page 1065, under 'Narberth, Montgomery County, Pennsylvania']
[capital letters = member of state or county societies]
[The symbol (a '+' inside a circle) indicates a member of the American Medical Association]
[Pa 3 = Penn Med College, Gettysburg]
[the numbers in parentheses apparently represent the number of years of practice before the current law, and the year he received his state license]
HOUGHTON, CHAS. W. (b '37) [symbol]--Pa. 3 '60; (1 '81); not in practice
[American Medical Directory, fourth edition, 1914, page 1326, under 'Wynnewood, Montgomery County, Pennsylvania']
[capital letters = member of state or county societies]
[Pa 3 = Penn Med College, Gettysburg]
[the numbers in parentheses apparently represent the number of years of practice before the current law, and the year he received his state license]