[8] Dr. Hibbert's work is illustrated by very carefully drawn and accurate views of some of the old cones and craters of this district, accompanied by detailed descriptions.
[9] The lava of Schorenberg, near Rieden, is interesting from the fact, stated by Zirkel, that it contains leucite, nosean, and nephelin.—Die Mikros. Beschaf. d. Miner. u. Gesteine, p. 154 (1873).
[10] Hibbert, loc. cit., p. 23.
[11] At the time of the author's visit the underground caverns, which are deliciously cool in summer, were used for the storage of the celebrated beer brewed by the Moravians of Neuwied.
[12] Hibbert, loc. cit., p. 129.