Epidemic diptheria; a research on the origin and spread of the disease from an international standpoint.

  • Arthur Newsholme
Date:
1898
Catalogue details

Licence: Public Domain Mark

Credit: Epidemic diptheria; a research on the origin and spread of the disease from an international standpoint. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    The true significance of the relationship between rainfall and prevalence of diphtheria may be further elucidated by plotting out the yearly winter (October to March) and summer (April to September) rainfall. This is done in Pig. 52. It will be noticed that most commonly in dry RAINFALL AT GREENWICH. Per- centage tion Percentage deviation of each year's rainfall from the mean for 55 years (=24'3 inches), from mean §; rain- 2: co; fall. + 40 : Fig. 51. Note.—In this and the subsequent diagrams of rainfall, etc., the magnitude of the epidemic in any given year is not mea- sured by the length of the black columns or of the columns en- closing circles in them. For the actual amount of diphtheria the diagram of yearly incidence of diphtheria for each place must be consulted. An attempt has been made, however, to distinguish between severe and less severe epidemics by usino- black columns for the former, and columns enclosing small circles for the latter, though the relative magnitude of these can only be ascertained by reference to the previous diagrams both years the summer and the winter rainfall were deficient in amount, though this is not uniformly so. The Brighton returns tell the same tale. The average