(Continued in the table of measles deaths, [p. 655])
It is not without significance that the vital statistics of Sweden were the first to give whooping-cough something like its rightful place among infantile causes of death: from 1749 to 1764 the deaths set down to that cause were 42,393, or an annual average of 2600, the epidemic year 1755 having 5832. In this we should find merely the influence of systematic nomenclature. Nosology, or the scientific classification of diseases, may be said to have begun under Linnaeus, who was for many years professor of medicine at Upsala before he became professor of botany, and was teaching a somewhat rudimentary nosology to the Swedish students of medicine before the great work of his friend and correspondent Sauvages made classifications general.
Concerning the year 1751, which has 275 deaths from whooping-cough in the London bills, Fothergill writes in May: “Great numbers of children had the hooping cough, both in London and several adjacent villages, in a violent degree. Strong, sanguine, healthy children seemed to suffer most by it; and to some of them it proved fatal where it was neglected or improperly managed”—the deaths having become more numerous towards the end of the year[1240]. At Edinburgh, during the second year of high mortalities in the famine-period 1740-41, whooping-cough has 101 deaths to 112 from measles, having had only a fourth part as many the year before (see p. 523). In the Kilmarnock register from 1728 to 1763, “kinkhost” is credited with a total of 116 deaths, about 3 on an annual average, measles having a total of 93 during the same thirty-six years. In Holy Cross parish, a suburb of Shrewsbury, chincough has 9 deaths in the ten years 1750-60, and 6 in the next ten years, measles having 4 and 15 in the respective periods, and convulsions 9 and 31. In Ackworth parish, chincough has no deaths in the ten years 1747-57, and 2 in the next ten years, “infancy” having 13 in each decade, “convulsions” and measles none in the first, 6 and 2 respectively in the second. Warrington, in the disastrous smallpox year, 1773, had 16 deaths from chincough and 34 from convulsions. In the two years 1772 and 1773, Chester had 33 and 10 deaths from chincough, 70 and 69 from convulsions, 17 and 13 from “weakness of infancy.”
Watt’s researches in the registers of all the Glasgow burial-grounds brought out the fact that whooping-cough during a period of thirty years, 1783 to 1812, had been a common and somewhat steady cause of death among infants, having made 4·51 per cent. of the annual total of deaths at all ages in the first six years of the period, and 5·57 per cent. in the last six years[1241]. This was a higher annual average ratio than in the London bills for the same period (see the tables at p. 647 and p. 655), and was probably the maximum in Britain, inasmuch as the Glasgow death-rate of infants was the worst from all causes.
Whooping-Cough in Modern Times.
When the causes of death began to be registered, in July, 1837, whooping-cough was found to have the following relative place among the principal maladies of children during the latter six months of the year in London and in all England and Wales.
Mortality by diseases of Children, last six months of 1837.
| London | England and Wales | |||
| Convulsions | 1717 | 10729 | ||
| Measles | 1354 | 4732 | ||
| Whooping-Cough | 1066 | 3044 | ||
| Smallpox | 763 | 5811 | ||
| Scarlatina | 418 | 2550 |
Throughout the whole registration period, whooping-cough has kept its place steadily among the chief causes of infant mortality, neither decreasing nor increasing notably in the successive periods from 1837 to the present time. Its mortality has varied a good deal from year to year, owing to occasional great epidemic years such as 1866 and 1878; but on the mean annual average of decennial periods, it has varied little:
Annual Deaths by Whooping-cough per million living at all ages.