Licence: Public Domain Mark
Credit: Influenza / by W.T. Gairdner. Source: Wellcome Collection.
Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.
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![the two may not differ greatly ; but the epidemic conditions differ so much as to make it clear that we have two diseases to account for, and not one only. Diagrams (to be read as in connection with more complete numerical details in Appendix I, p. 26) showing, in the upper spaces, the Mortality from Acute Respiratory Diseases (Bronchitis, Pneumonia, Pleurisy); and, in the lower spaces, the Mean Temperature, as registered in successive weeks of December and January in three typical seasons (as explained in the text). [It should be noted, however, that the engraver has not quite accurately succeeded in adjusting the indications of the weeks to the temperature and mortality curves, so that in the two mild seasons the figures representing the Means do not correspond with the weeks below which they are placed, although the curves of mortality and of temperature in each case correspond. A reference to the actual figures in the Appendix will be sufficient to enable any one to correct this error in detail.] Now, in endeavouring to apply these data, which may be regarded as historically true and well-ascertained, to the present occasion, I thought it necessary to attempt a hasty](https://iiif.wellcomecollection.org/image/b21914503_0007.jp2/full/800%2C/0/default.jpg)
