382 PROCEEDINGS OF SECTION C. 
3 Neumann, Hoffmannsegg, Schwdgrichen, 1818.—Referred to 
in Gilb. Annal. Bd. 61, pp. 249-269. Fulgurites from Bahia, 
in Brazil, similar to Paderborn fulgurites. 
** Blumenbach, Kéiferstein, A. Van Converden, referred to in 
Gilb. Annal., Bd. 55, p. 140. Blumenbach had collection of black 
fulgurites. Kiferstein found fulgurites on the heath of Nietlebe. 
Van Converden noticed fulgurite 30 feet long, inclined 60 degrees 
to perpendicular and one 15 feet long, inclined 80 degrees to 
perpendicular. 
*® Karl Gustav Fiedler.—Ueber die Blitzréhren und ihre Entste- 
hung. Gilb. Annal. Bd. 55, pp. 121-164, 1817. Contains a 
lengthy account and gives references to literature of the subject. 
Same title. Bd. 61, pp. 235-248, 1819. Noch einiges von der 
Blitzrdhren. Bd. 61, pp. 249-262, 1819. Neuer Fundort der 
Blitzrdhren. Bd. 68, pp. 209-221, 1821. 
*° On one of the vitreous tubes found at Drigg, in Cumberland. 
Trans. Geol. Soc. Vol. 5, pp. 617, 618, 1821. 
7 KG. Fiedler—Auffiinding und Ausgrabung einer 8 Leipzig 
Ellen 52 Zoll langen Blitzréhre bei Dresden. Gilb. Annal. Bd. 
71, pp. 801-312, 1822. 
*® Ludwig Wilhelm Gilbert.—Noch einiges von Blitzréhren, und 
von Wirkungen des Blitzes auf Felsenstiicke. Gilb. Annal. Bd. 
71, pp. 337-344, 1822. 
* C. H. Pfaff— Beobachtete Entstehung einer Blitzréhre durch 
den Blitz. Gilb. Ann. Bd. 72, pp. 111, 112, 1822. Some Schles- 
wig sailors found tubes where the lightning had been observed to 
strike. 
°K. G. Fiedler.—Auffiinding und Ausgrabung einer Blitzrohre 
im K6nigreiche Ungarn, bis an ihr Ende. Gilb. Annal. Bd. 74, 
pp. 213-217, 1823. (See also “Quart. Jour. 8c.,” vol. 17, pp. 
181-183, 1824.) 
*! Hagen.—Bericht von der Bildung einer Blitzréhre durch den 
Blitz am 17ten Juli, 1823 zu Rauschen in Ostpreussen. Gilb. 
Annal. Bd. 74, pp. 325-330, 1823. Professor Hagen’s son saw 
a birch struck. On digging beneath, fused tubes —z.e., fulgurites 
were discovered. 
*° Beudant, Hachette and Savart.—Expérience sur la formation 
des tubes fulminaires. Annal Chim. et de Physique, t. 37, pp. 
319-321, 1828. Artificial production of fulgurites from powdered 
glass. 
° Ribbentrop.—Ueber Blitzréhren. Braunschweig, 1830. (See 
also ‘‘ Conversations Lexicon.”) 
** Chas. Darwin.—Researches, &e. ; Voyage in the Beagle. 
1839, pp. 69-71. Refers to discovery of number of fulgurites on 
