June 28th.—A light shock in San Francisco. August 4th.—A smart shock was felt in Stockton and Sacramento. September 14th.—Smart shock at San Francisco and San José. Total number recorded in 1850, five. 1851. May 15th.—Three severe shocks in San Francisco. During this earthquake windows were broken and buildings severely shaken. A large amount of merchandize was thrown down in a store on California Street. The shipping in the harbor rolled heavily. An eruption of Mauna Loa and shock in the Sandwich Islands same day. May 17th.—A light shock in San Francisco. May 28th.—A light shock on the Salinas. June 13th.—A smart shock at San Francisco. This was felt at San Luis Obispo and San Fernando. December 2d.—A shock at Downieville. December 31st.—A smart shock at Downieville. Total recorded in 1851, six. 1852. From the beginning of this year until the middle of its last quarter, no disturbances of the coast was noted until the month of November. In this month the southern portion of the State was violently disturbed. November 26th.—The number of shocks on this day at San Simeon was eleven, and at Los Angeles and San Gabriel the same number. Nearly or quite the same number was also observed by parties having in charge a Government train in transit from Fort Yuma to San Diego. This earthquake or the series was experienced over the entire country, east and south of Luis Obispo to San Diego and the Colorado River, covering a line of country about three hundred miles in extent. From subsequent accounts we learn that it also reached as far as Guaymas, in the province of Sonora, Mexico. For a period of six days subsequent to the twenty-sixth of November, the whole of this region to the Colorado, was convulsed, with slight intermissions. During this time a _mud volcano_ opened on the Colorado Desert, and another south of the river; one of these was visited by a portion of the United States command under Col. Hientzelman. December 17th.—Two smart shocks at San Luis Obispo, which fractured the walls of two adobe buildings, and threw down a part of the wall of a house belonging to, and occupied by Don Jesus Pico and family. During the months of November and December, the southern particularly, and middle portions of California were much disturbed; shocks were experienced in those sections for sixty-five days, with variable intermissions; they were noticed as far north as the thirty-seventh parallel, but generally light in their nature. The latest date of this series was to the fifth of January, 1853, on the valley of the San Joaquin.