Note 23 — Chapter IV
Reading edition
The Eifel district has been fully described by Hibbert, Von Dechen, and other writers. Von Dechen's little handbooks to the Eifel and Siebengebirge are useful guides.
[24] These Würtemberg vents have been elaborately described and discussed by Professor W. Branco of Tübingen in his Schwabens 125 Vulkan-Embryonen und deren tufferfülte Ausbruchsröhren, das grösste Gebiet chemaliger Maare auf der Erde, Stuttgart, 1894.