518 Correspondence. 



George W. Denys, Bart. Professor McChesney, U.S. Consul at New- 

 castle, Dr. Walton, Mr. Bowes, and Mr. Cockburn joined the party. 

 The chairman, after dinner, in an appropriate speech, alluded to the 

 manner in which their president had before entertained them at Salt- 

 burn, and to his uniform kindness and untiring efforts for the good of 

 their society and the spread of a taste for natural history pursuits. 

 Mr. Wood having responded, other speeches followed, and the 

 pleasm'e of the excursion was completed by a visit to Eushbrook 

 Hall, the seat of Jolui Bell, Esq. — Darlington and Stocldon Telegraph. 



oos,i2,Es:pon^iDSisroE. 



NOTES FEOM OUE CORRESPONDENTS. 



. 1. Dk. Gustaf Lindstkom writes from Wisby, Island of Gotland 

 (August 18th) : " The debates on the recent changes of the surface 

 of the land, now going on in the pages of your Magazine, are of 

 great interest to us Swedes, as our Geological Survey has had almost 

 exclusively for some years to handle questions of that kind. We 

 have natural features similar to your Eskers and Kaims, your 

 Boulder-clay, Leda-clay, etc. ; I thuak these formations have been 

 more thoroughly studied here than elsewhere." 



2. In a subsequent letter, dated October ith. Dr. Lindstbom 

 writes : " The marks figured by Mr. Mackintosh in the last number 

 (September) of your Magazine, Plate XV., Fig. 5, are evidently ice- 

 marks (or made by Glaciers) not made by the waves and stones as 

 he supposes. We have plenty of them here, and their exact counter- 

 parts may be seen in the Alps." 



3. Mr. Spencer G. Perceval^ writes (August 20th) to correct 

 an error as to the discovery of " Wulfenite,"^ in Pembrokeshire. 

 ''It is not," he writes, " 'Wulfenite,' as I was led to suppose, but 

 'Brookite' (oxide of Titanium) ; for which information I am in- 

 debted to Mr. Waiington Smyth" (Mineralogist to the Duchy of 

 Cornwall) . " The crystals which I supposed to be of Tin, are like- 

 wise Titanium. Those of Brookite much resemble sj)ecimens from 

 Snowdon, but are far more minute." 



4. Mr. Thomas C. Brown, of Further Barton, Cirencester (Sept. 

 11th), gives a long and interesting account of an ancient forest near 

 Loch Maree, Eoss-shire, of which the following is a summary : 



" The stools of the trees are wholly embedded in peat, varying 

 from 18 to 36 inches in thickness. Beneath the peat is a bed of 

 gravel, in the surface of which the trees appear to have grown. 

 Thej were generally, if not exclusively. Fir, the natural tree of the 

 Highlands." 



The diameter of the bole of several measured from 14 to 28 

 inches, consisting exclusively of heart-wood — the sap-wood had 



^ Severn House, Henbury, Bristol. 



2 See Geological Magazine, August (No. 26), p. 377. 



