Compressed air illness, or, So-called caisson disease / by E. Hugh Snell.
- Snell, E. Hugh.
- Date:
- 1896
Licence: Public Domain Mark
Credit: Compressed air illness, or, So-called caisson disease / by E. Hugh Snell. Source: Wellcome Collection.
Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.
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![Fig. C. [These three diagrams, representing the face of the tunnel on December llth, 1894, January 15th, 1896, and May 30th, 1896, respectively, show how the geological characters of the face vary from time to time ; the escape of the compressed air through these different strata varies in rapidity according to the nature of the soil. Thus through loose ballast the escape is very free, while through the clay only a relatively small quantity of air can find its way ; it follows, therefore, that the natural ventilation of the compressed air chamber will vary largely from time to time, if a certain standard of air pres- sure is to be maintained.] at present. But it cannot escape attention that in the month of September, when the supply of fresh air was the least, the largest number of cases of illness occurred ; whereas in November, when the supply of fresh air was larger than it ever had been before, only two cases of illness arose, in spite of the fact that the pressure was higher than in any previous month.](https://iiif.wellcomecollection.org/image/b21515360_0151.jp2/full/800%2C/0/default.jpg)
