PROCEEDINGS 
OF THE 
ROYAL SOCIETY OF EDINBURGH. 
vol. iv. 1860-61. No. 54. 
Monday , 17 th December 1860. 
Professor KELLAND, Vice-President, in the Chair. 
The following Communications were read : — • 
1. Contributions to the Natural History of Volcanic Phe- 
nomena and Products in Iceland. By W. Lauder Lind- 
say, M.D., F.L.S. Communicated by Professor Balfour. 
r These contributions are part of the results of the author’s visit to 
Iceland in June 1860, and will be found embodied in his Paper 
“ On the Eruption, in May 1860, of the Kotlugja Volcano, Iceland,” 
in the “Edinburgh New Philosophical Journal” for January 1861, 
page 6, with a map (Plate II.), “ Illustrative of the Physical Geo- 
graphy of that part of the South of Iceland in which Kotlugja is 
situated.” The contributions in question may be classified under 
the following heads : — 
(1.) An Account of the Kotlugja Volcano. 
a. Its topography and geology. 
b. Peculiarities of its crater : the Icelandic gjas in relation 
thereto. 
c. Chronological record of its eruptions, which have been as 
follows : — 
3 f 
VOL. IV. 
