The _Pacific News_ contains some interesting statistics of the condition of San Francisco at the close of the year 1850. The population of the city is estimated at 35,000. One hundred and seven miles of street are already laid out, one quarter of which is built upon and occupied. The business streets are substantially built of brick or iron. In addition to seventeen large auction firms and eight express companies, the city boasts of ten first class hotels and seven daily papers. The amount of gold-dust regularly shipped and entered for exportation during the year 1850 was $30,000,000; the estimated amount taken away by passengers, $12,000,000. The amount of bullion received was $1,722,600. The number of vessels which arrived during the year was 1,743 bringing 35,333 male and 1,248 female passengers; the number of clearances amounts to 1,461 vessels, carrying away 26,593 male and eight female passengers. The total value of the merchandise received by foreign and domestic vessels during the year was between four and five millions of dollars. In addition to 14 steamers running regularly between San Francisco and Panama, and three on the Oregon route, there are 45 steamers and 270 other craft of various kinds on the bay and inland streams. We have news from Oregon to the middle of December, at which time the Legislature was in session. The message of Governor Gaines recommends the establishment of a liberal system of education, and asks for the passage of a law for protection against the Indian tribes. It also maintains the importance of a liberal policy on the part of the General Government in the donation of lands to actual settlers. The country appears to be in a highly prosperous condition; all the towns on the Columbia and its tributaries are growing rapidly. The news from the gold placers on the Klamath and Umpqua rivers, near the borders of California, is encouraging as to the yield of dust, but the Oregonians place their main reliance on their agricultural interests. The yield of wheat is said to be not only double per acre that of the Atlantic States, but it is a never-failing crop. The people in Oregon City are agitating the subject of a railroad to connect the Willamette Valley with the Columbia river, at some point accessible to large vessels. It is estimated that the whole cost will only be about $500,000, which it is proposed to raise in one thousand shares of $500 each. Twelve months, it is believed, will complete the work. EUROPE.