NOTES. cliii 



sent to me, in August 1854, from Flensburg, by my friend the astronomer 

 Christian Peters (now at Albany in North America), one can distinctly recognise 

 the parasitical margin-crater (called Pozzo di Fuoco) which was formed on the 

 E.S.E. side in January 1833, and had several strong eruptions of lava until 

 1843. 



( 59 ) p. 427. The little-characteristic indefinite name of trachyte (rough 

 stone), which is now so generally given to the rock in which volcanoes break 

 forth, was first applied by Hauy in 1822, in the second edition of his Traite' de 

 Mineralogie, vol. iv. p. 579, to a rock of Auvergne, and merely accompanied by 

 a notice of the derivation of the name, and a short description in which there is 

 no mention of the older designations : " granite chauffe' en place " of Desmarets, 

 "trap-porphyry," and "domite." Previously to 1822, however, the name had 

 been known in verbal communications occasioned by Hauy's lectures in the 

 Jardin des Plantes ; and it appears in Von Buch's Memoir on Basaltic Islands 

 and Elevation-Craters, published in 1818; in Daubuisson's Traite' de Mine'ralogie, 

 1819; and in Beudant's important work, " Voyage en Hongrie." From friendly 

 letters very recently received from Elie de Beaumont, the recollections of M. 

 Delafosse, formerly Aide-Naturaliste to Hauy, and now Membre de 1'Institut, 

 would carry the use of the name back to between 1813 and 1816. The publi- 

 cation of the name " domite," by Von Buch, seems, according to Ewald, to belong 

 to 1809; domite is first mentioned in the third letter to Karsten (Geognostische 

 Beobachtungen auf Reisen durch Deutschland und Italien, Bd. ii. 1809, S. 244). 

 It is there said : " The porphyry of the Puy de Dome is a peculiar kind of 

 rock, hitherto without a name, consisting of felspar crystals with glassy lustre, 

 hornblende, and black lamina} of mica. In the cracks and clefts of this rock, 

 which I will call provisionally domite, there are fine drusic cavities whose walls 

 are covered with crystals of ferruginous mica. In the whole length of the Puy, 

 cones of domite alternate with cones of scoria;." The second volume of the 

 Travels, which contains the letters from Auvergne, was printed in 1806, but not 

 published until 1809, which is therefore, strictly speaking, the date of the 

 publication of the name. It is singular that in Von Buch's memoir four years 

 later, " Ueber den Trapp-Porphyr," domite is no longer spoken of. In referring, 

 in the text, to a profile of the Cordilleras contained in the journal of my travels 

 for July 1802, extending from 4 N. to 4 S., and inscribed " Affinite' entre le 

 Feu volcanique et les Porphyres," my wish was to recall that it was this profile 

 which represents the three breakings-through of the volcanic groups of 

 Popayan, Los Pastes, and Quito, and the outburst of trap-porphyry in the granite 

 and mica-slate of the Paramo de Assuay (near the Cadlud Road, at a height of 

 15,526 feet), which led Leopold von Buch to ascribe to me only too decidedly 



