On the Eruptions of the Soufritre and Mont Peiee. 4-23 



treated with the excessive carbon dioxide grew more luxuriantly, and 

 exhibited more complete internal differentiation than those deprived 

 of this source of carbon. 



This result is perhaps hardly surprising, as the one set of his plants 

 was entirely deprived of its source of atmospheric carbon dioxide, and 

 it would have been interesting to have compared his specimens at the 

 end of the experiment with others grown in normal air, but otherwise 

 under similar conditions of temperature, illumination, &c. 



It is, however, worthy of notice that Teodoresco kept the atmo- 

 sphere round his plants in a tolerably dry condition by means of 

 sulphuric acid. This might tend to promote transpiration, and it may 

 be that the apparent discrepancies between his plants and our material 

 as regards both structure and histological differentiation is partly per- 

 haps to be attributed to this circumstance. But only further investi- 

 gations can settle this and many other points of interest connected 

 |with the influence, direct as well as indirect, of alteration in the con- 

 stitution of the atmosphere on plant-structure. 



tf Preliminary Report on the Recent Eruption of the Soufriere in 

 St. Vincent, and of a Visit to Mont PeJee, in Martinique." 

 By Tempest Anderson, M.D., B.Sc., F.G.S., and John S. 

 Flett, M.A., D.Sc, F.G.S. Communicated by the Secretaries 

 of the Royal Society. Received August 11, 1902. 



[Plates 11-13.] 



Dr. Tempest Anderson and Dr. John S. Flett, who received a com- 

 mission from the Royal Society to investigate the recent volcanic 

 eruptions in the West Indies, more especially in St. Vincent, submit 

 the following preliminary report : — 



We arrived at Barbados on June 8 (having left London un May 28), 

 and thence proceeded to St. Vincent, where nearly 1 weeks were 

 spent, mostly at Chateaubelair and Georgetown, in the vicinity of the 

 Soufriere. On June 29, Dr. Tempest Anderson went to Grenada to 

 examine the lagoon at St. George's, returning some days later, Dr. 

 Flett remaining at St. Vincent to complete his investigations. 



On July 6 we arrived at Martinique, and on the 12th left that 

 island for Dominica, where we remained until July 17, when we 

 returned to Barbados. In all 6 weeks were spent in the West Indies. 



In the Windward Islands, in the month of July — the middle of 

 the rainy season — the work of a geological expedition is necessarily 

 attended with many difficulties, but these were greatly mitigated by 

 the kindness rendered by all with whom we came in contact. To 

 Sir Robert Llewellyn, K.C.M.G., the Governor of the Windward 

 Islands, and to the Administrators of St. Vincent, St. Lucia, and 



VOL. LXX. 2 G 



