CONTENTS. 
PREFACE, 
INCLUDING A BRIEF NARRATIVE OF EXPLORATIONS FROM 1853 TO 1857. 
ERRATA, 
WITH ADDITIONS AND CORRECTIONS UP TO 1860. 
PART I.— METEOROLOGY. 
With ail Isothermal Chart and Plates of Scenery. 
Comparison of Nebraska with regions having a similar climate in Europe — 2. Climate of Washington Territory — 9. 
General Conclusions (inserted here by mistake, instead of at the end of the Chapter)— 14. Cold as an obstruction to the 
Railroad route — 15. Snow as an obstruction to the Railroad line — 19. Table of mean temperatures at stations between the 
mouth of the St. Lawrence and Puget Sound — 26. 
PART II.— BOTANICAL REPORT. 
With ten Plates— List of Illustrations 7. 
No. 1. — Report ox the Botany of the Route — [including the Physical Geography and the distribution of plants 
and animals in Washington Territory] — 9. The Cascade Mountains — 9. Great Plain of the Columbia — 12. Region west 
of the Cascade Mountains — 14. Prairies of the western region — 15. Forests of the western region — Coniferous trees — 20. 
Broad-leaved trees — 23. Shrubby undergrowth — 26. Climate of the western region — 28. Fresh waters of the Territory — 
30. Salt waters of the Territory — 32. Scenery of the western region — 34. 
No. 2. — Catalogue of Plants ^collected East of the Rocky Mountains — 36. Echinospcrmum Fremontii — 42. 
Endolepis Suckleyi — 43. Obione Suckleyana — 43. [N. B. — Only new species are named in these tables.] 
No. 3. — Catalogue of Plants collected in Washington Territory — 46. Plants collected from the summit of 
the Cascade Mountains, eastward to the upper Columbia River, and northward to the 49th degree of latitude, between July 
and September, 1854 — 47. Astragalus serotinus — 47. Malacothrix crcpoides — 49. Plants collected west of the Cascade 
Mountains during 1854-'55 — 51. Sisymbrium deflexum — 52 [described in Whipple's P. R. R. Rep., vol. IV., p. 66.] 
Lathyrus villosus — 54. Cymopterus littoralis — 59. 
Index to Botanical Report — 69. 
