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VIII. Petrographical Notes on the Products of the Eruptions of May, 1902 , at the 
Soufriere in St. Vincent. 
By John S. Flett, M.A., D.Sc. 
Communicated by H. B. Woodward, F.B.S. 
Received January 20,-—Read January 23, 1908. 
[Plates 26-27.] 
Contents. 
The ejecta of the eruptions of May, 1902 . 
Volcanic sand and dust. 
Bombs. 
Blocks of older andesites in the ash of 1902 . 
Anorthite-olivine blocks. 
Norites and quartz-norites. 
Sedimentary rocks :—Calc-silicate hornfelses, quartzites, &c, 
The older igneous rocks of St. Vincent. 
The volcanic dusts that fell in Barbados, 1812, 1902 and 1903 . 
Bibliography. 
Description of plates. 
Page 
306 
306 
309 
313 
317 
320 
321 
322 
326 
328 
331 
The rocks collected during our visit to the West Indies, in 1902, included specimens 
of the ashes, ejected blocks, &c., cast out by the eruptions of May, and of such lavas, 
belonging to previous eruptions of the Soufriere and the extinct volcanoes of the 
south part of the island, as were in good preservation and easily accessible from our 
line of route. We are also indebted to Mr. Macdonald, Mr. Darrell, and other 
inhabitants of St. Vincent, and to Sir Daniel Morris and the officers of the Imperial 
Agricultural Department for the West Indies acting under him (more particularly to 
Mr. Henry Powell, Curator of the Botanic Station, St. Vincent), for specimens sent 
us after our departure for England. Professor Lacroix has very kindly furnished us 
with specimens of the older rocks of St. Vincent, which he collected during his visit, 
and of an ejected block containing cordierite, which he found on the edge of the 
crater in January, 1903. 
yol. ccviii.—a 434. 2 R 
20.7.08 
