Category:A natural scale of heights by the application of which the measures of different countries are reduced to a common measure known to by (...) geographes. Constructed by Miss Colthurst - btv1b8491110k
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Media in category "A natural scale of heights by the application of which the measures of different countries are reduced to a common measure known to by (...) geographes. Constructed by Miss Colthurst - btv1b8491110k"
The following 4 files are in this category, out of 4 total.