Appendix A: Table of distances measured along the route travelled by the expedition in 1849
Appendix B: Latitudes and longitudes of the principal triangulation stations ; tabulation of the triangles developed in the survey of the Great Salt Lake ; and, Table of geographical positions
Appendix C: Zoology: Quadrupeds and birds, by Prof. Spencer F. Baird ; Reptiles, by Prof. Baird and Chas. Girard ; Insects, by Prof. Haldemann
Appendix D: Botany: Catalogue of plants collected by the expedition / by John Torrey
Appendix E: Letter from Professor James Hall ... containing observations on the geology and palæontology of the country traversed by the expedition and notes upon some of the fossils collected on the route
Appendix F: Letter from L.D. Gale with a chemical analysis of th water of the Great Salt Lake and other mineral waters an saline substances, collected during the journey.