In collaboration with the hydrographer, material from the sea floor was obtained by soundings in various localities. This material is being examined microscopically, and its physical properties are being determined (specific gravity, gradation of sizes, radioactivity, etc.).

GENERAL OBSERVATIONS

The general reader is reminded that the geological observations recorded here are in no way complete. Much detailed work is necessary on these various islands before the full record can be written. Nature has laid open the story of her history to the careful investigator, but from the casual one she withholds the deeper meaning.

ACKNOWLEDGMENTS

The writer wishes in conclusion to thank the following for their hearty co-operation, which made the above results possible:

The work at South Georgia would have been impossible but for the kind assistance of the managers of the whaling companies:

The excellent surveying instruments which were so kindly lent by Messrs. Troughton and Simms proved invaluable under all conditions.