Sphaerulites in glass and in silicified wood. -in obsidian.
Sowerby, Mr. G.B., on fossil-shells from Van Diemen’s land. -from St. Jago. -land-shells from St. Helena.
St. Helena. -crater of elevation of.
St. Jago, crater of elevation of. -effects of calcareous matter on lava.
St. Paul’s rocks.
Stokes, Mr., collections of sphaerulites and of obsidians.
Stony-top, Little. -Great.
Stratification of sandstone in New South Wales.
Streams of obsidian.
Stutchbury, Mr., on marine remains at Otaheite.