Chronology of epidemics resumed from 1801 567 The Smallpox Epidemic of 1817-19 571 Extent of Inoculation with Cowpox or Smallpox, 1801-1825 582 The Smallpox Epidemic of 1825-26 593 A generation of Smallpox in Glasgow 597 Smallpox in Ireland, 1830-40 601 The Epidemic of 1837-40 in England 604 Legislation for Smallpox after the Epidemic of 1837-40 606 Other effects of the epidemic of 1837-40 on medical opinion 610 The age-incidence of Smallpox in various periods of history 622 CHAPTER V. MEASLES. Derivation and early uses of the name 632 Sydenham’s description of Measles in London, 1670 and 1674 635 Measles in the 18th century 641 Increasing mortality from Measles at the end of the 18th century 647 Measles in Glasgow in 1808 and 1811-12: Researches of Watt 652 Measles in the Period of Statistics 660 CHAPTER VI. WHOOPING-COUGH. Earliest references to whooping-cough 666 Whooping-cough in Modern Times 671 Whooping-cough as a Sequel of other Maladies 674 CHAPTER VII. SCARLATINA AND DIPHTHERIA. Nosological difficulties in the earlier history 678 The Throat-distemper of New England, 1735-36 685 Angina maligna in England from 1739 691 An epidemic of Throat-disease in Ireland, 1743 693 Malignant Sore-throat in Cornwall, 1748 694 Fothergill’s Sore-throat with Ulcers, 1746-48 696 “Scarlet Fever” at St Albans, 1748 698 Epidemics of Sore-throat with Scarlet rash in the period between Fothergill and Withering 699 Scarlatina anginosa in its modern form, 1777-78 708 History of Scarlatina after the Epidemic of 1778 713 Scarlatina (1788) and Diphtheria (1793-94) described by the same observer 715 Scarlatinal Epidemics, 1796-1805 719 Scarlatina since the beginning of Registration, 1837 726 Reappearance of Diphtheria in 1856-59 736 Conditions favouring Diphtheria 744 CHAPTER VIII. INFANTILE DIARRHOEA, CHOLERA NOSTRAS, AND DYSENTERY. Summer Diarrhoea of Infants in London, 17th century 748 Summer Diarrhoea of Infants, 18th century 754