Appendix: Instructions of the National Academy of Sciences.--Correspondence between the British Admiralty and the United States Navy Department in relation to the stores left by the Polaris expedition on the west coast of Greenland.--Journals of Mr. H.C. Chester and Captain Geo. E. Tyson while on boat-journeys, June-July, 1872.--Journals used in the preparation of the Narrative of the Polaris expedition.