The San Joaquin is a very crooked stream flowing through a low mud-plain, with tule banks; the Sacramento is much less meandering, and its immediate basin, which is of sandy loam, is higher and more attractive than that of the San Joaquin.
The Feather, emptying into the Sacramento river about 20 m.
Wide), Summer Lake (a little smaller than Abert), and Goose Lake, the one last named lying partly in California and draining into the Sacramento system.
Goose Lake, for example, lies in the Great Basin at some seasons; but at other times it overflows and becomes a part of the drainage system of the Sacramento river.
Oranges, lemons and walnuts come chiefly from that section, but citrus fruits grow splendidly in the Sierra foothills of the Sacramento Valley, and indeed ripen earlier there than in the southern district.
Leaving Hampton Roads on the 18th of August 1838, it Mopped at Madeira and Rio de Janeiro; visited Tierra del Fuego, Chile, Peru, the Paumotu group of the Low Archipelago, the Samoan islands and New South Wales; from Sydney sailed into the Antarctic Ocean in December 1839 and reported the discovery of an Antarctic continent west of the Balleny islands; visited the Fiji and the Hawaiian islands in 1840, explored the west coast of the United States, including the Columbia river, San Francisco Bay and the Sacramento river, in 1841, and returned by way of the Philippine islands, the Sulu archipelago, Borneo, Singapore, Polynesia and the Cape of Good Hope, reaching New York on the 10th of June 1842.
The floor of this depression being below baselevel, it has necessarily come to be the seat of the mountain waste brought down by the many streams from the newly uplifted Sierra Nevada on the east and the coast ranges on the west; each stream forms an alluvial fan of very gentle slope; the fans all become laterally confluent, and incline very gently forward to meet in a nearly level axial belt, where the trunk riversthe Sacramento from the north and the San Joaquin from the south-east--wander in braided courses; their tendency to aggradation having been increased in the last half century by the gravels from gold washing; their waters entering San Francisco Bay.
More important is San Francisco Bay, situated about midway on the Pacific coast of the United States, the result of a moderate depression whereby a transverse valley, formerly followed by Sacramento river through the outermost of the Coast ranges, has been converted into a narrow straitthe Golden Gate and a wider intermont longitudinal valley has been flooded, forming the expansion of the inner bay.
The humidity of places such as Fresno, Sacramento and Red Bluff in the valley varies from 48 to 58.
Among the peculiarities of Californian climate it is not one of the least striking that as one leaves the Sacramento or San Joaquin plains and travels into the mountains it becomes warmer, at least for the first 2000 or 3000 ft.