Old Age: The results of information received respecting nearly nine hundred persons who had attained the age of eighty years, including seventy-four centenarians. By George Murray Humphry, M.D., F.R.S. Cambridge: Macmillan and Bowes, 1889

1890 Journal of Mental Science  
doi:10.1192/bjp.36.153.257 fatcat:4gzeg5wqnjcu3ilsmvm7jvv4oa