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sion to see where consumption was most abundant, and to 
examine the statement as to there being an immunity from 
consumption at a certain height as stated by Dr. Lombard 
and others. The report was edited by Dr. E. Muller.* 
Nearly all the doctors applied to sent in their reports, 
some few regularly during the five years which the commis- 
sion sat, but although the report from Davos would have 
been the most interesting in Switzerland, there is only one 
line and that refers only to two years. However, from the 
parallel valley of the Engadine some important reports were 
sent, and since then Dr. Ludwig has published additional 
particulars relating to the Engadine.")* 
The results arrived at by the commission were that there 
is no such thing as an immunity boundary, but that con- 
sumption becomes less common as we ascend, but instead of 
being found most rare in the highest villages those between 
1,300—1,500 metres (4,265 — 4,921 feet) have fewer cases 
than those between 1,500 — 1,800 metres (4,921 — 5,905 feet). 
Dr. Hermann Weber has already in his Klimotherapiej 
corrected the statement he made on the authority of others, 
and as I repeated it in the pamphlet |] I wrote on Davos I 
also take this earliest opportunity of correcting it, which is 
all the more necessary as this does not yet seem to have 
been done in what may be called the Davos literature. 
However, we see from Dr. Ludwig’s figures that phthisis is 
very rare in the Engadine ; and although we cannot any 
longer say that the inhabitants who have never quitted the 
valley of Davos have never been attacked by it, yet the 
cases or case are so few (I believe it is now some time since 
a case occurred) that we may say that, so far, there has been 
* Die Verbreitung der Lungenschwindsucht in der Schweiz, von 
E. Muller. Winterthur, 1876. 
t Das Oberengadin, von Dr. J. M. Ludwig. Stuttgart, 1877. 
X Ziemssen’s Allgemeine Therapie, vol. II., pt. 1. 
H Klimatologische Notizen ii. den Winter im Hochgebirge, von 
Arthur Wm. Waters. Basel, 1871* 
