...Secretary. OBSERVATIONS ON THE VEGETATION OF THE WALLULA GORGE.* BY AS FOSTER. The vast zone between the Rocky Mountains on the east and the Sierra Nevada and Cascade ranges on the west, and extending from the Arctic Ocean to the plateaux of Mexico, is an arid region,...

...similar investigations in the Great Basin region, or that portion of the United States lying between the Rocky Mountains on the east and the Sierra Nevada and Cascade Ranges on the west. The problems to be solved were: First, what types of vegetation indicate conditions...

...rains occurring in the winter, while the summers are drier. Many parts of the plateau lying between the Rocky Mountains on the east and the Sierra Nevada and Cascade Mountains on the west are arid and have great changes of temperature. The northern part of North America...

...industries. In certain sections the scenery attracts large numbers of people every summer. Enclosed by the Rocky Mountains on the east and the Sierra Nevada and Cascade Mountains on the west, is an extensive plateau consisting of three chief divisions. The most northerly...

...Pacific Oceaii. II. — The Central Province extends from Mexico to the British possessions, between the Rocky Mountains on the east and the Sierra Nevada and Cascade Mountains on the west. The following are the species peculiar to the province: Umax montaniis. Polygyrella...

...Other settlers coming into the Intel-mountain area, the vast basin and range country which lies between the Rocky Mountains on the east and the Sierra Nevada and Cascade Ranges on the west, were forced to the same conclusion. In its place, the doctrine of prior appropriation,...

...with the gray green of the sagebrush. And indeed everywhere in the Great Basin — between the Rockies on the east and the Sierra Nevada and Cascade Range on the west — this tree is likely to be the most abundant, as it is the most widely distributed, at least in...

...of other species. This species was known to occur in practically all of the Western States between the Rocky Mountains on the east and the Sierra Nevada and Cascade Mountains on the west. The Thomas locust, Melanoplus thomasi Scudder, is a Mexican species ranging...

...California, thrusts its ramparts high above the surface, with many peaks exceeding 4600 metres. Between the Rocky Mountains on the east and the Sierra Nevada and Cascade Ranges on the west, within the Continental United States are the Colorado and Columbia plateaus and...