Mortality Statistics of the Seventh Census of the United States, 1850: Embracing -- I. -- the Cause of Death, II. -- the Age and Sex, III. -- the Color and Condition, IV. -- the Nativity, V. -- the Season of Decease, VI. -- the Duration of Illness, VII. -- the Occupation, of the Persons Reported to Have Died in the Twelve Months Preceding the First of June of that Year, with Sundry Comparative and Illustrative Tables