+------------------------+-------+----------------------+-------------+ | | | Percentage of | Mean | | | | rainfall. | temperature.| | | Mean +----------------------+-----+-------+ | |annual |Spring. | | | Station. | rain- | |Summer. |Spring. | | | fall. | | |Autumn. | |Winter.| | | | | | |Winter.| | | +------------------------+-------+----+----+----+-------+-----+-------+ | |Inches.| | | | | | | |San Francisco Region | 15.90 | 25 | 1 | 14 | 60 | 57 | 50 | |Region of Lower Columbia| 46.45 | 24 | 6 | 23 | 47 | 51 | 40 | |Drum Barracks, Cal | 8.74 | 26 | 3 | 4 | 67 | 60 | 56 | |San Diego, Cal | 9.31 | 20 | 4 | 20 | 56 | 60 | 54 | |Camp Independence, Cal | 6.60 | 17 | 5 | 9 | 69 | 57 | 39 | |Fort Bidwell, Cal | 20.23 | 24 | 8 | 15 | 53 | 48 | 32 | |Camp Warner, Oreg | 14.41 | 30 | 8 | 17 | 45 | 42 | 29 | |Camp Harney, Oreg | 8.76 | 26 | 13 | 18 | 43 | 47 | 27 | |Fort Colville, Wash | 14.06 | 26 | 22 | 18 | 34 | 45 | 24 | |Fort Walla Walla, Wash | 19.36 | 24 | 11 | 26 | 39 | 52 | 34 | |Camp McDermitt, Nev | 8.53 | 35 | 9 | 13 | 43 | 46 | 29 | |Camp Halleck, Nev | 10.98 | 33 | 11 | 21 | 35 | 45 | 28 | |Fort Lapwai, Idaho | 14.89 | 28 | 16 | 23 | 33 | 53 | 33 | |Fort Boisé, Idaho | 15.48 | 33 | 8 | 16 | 43 | 52 | 30 | +------------------------+-------+----+----+----+-------+-----+-------+ _Third District._--In Arizona and New Mexico there is a general maximum of rainfall in summer, and a restricted maximum in winter. The principal minimum is in spring. In Table XI the stations are arranged according to longitudes, a disposition well suited to exhibit their relations. In eastern New Mexico the distribution of rainfall has the same character as in adjacent Texas, but with a more decided maximum. Half of the total rainfall is in summer and half of the remainder in autumn. Westward the maximum diminishes slightly, but it appears in every station of the two territories. In western Arizona the winter maximum of the Pacific coast asserts itself, and it can be traced eastward as far as Fort Wingate, New Mexico. Except at Camp Mohave, on the western border of Arizona, it is inferior in amount to the summer maximum. TABLE XI.--_Seasonal precipitation in Arizona and New Mexico._