Donations to the Library: U. S. Census, 1860—Agriculture; American Journal of Science, November, 1865, and January, 1866; Proceedings of the Phila. Acad. Nat. Sci., April to October, 1865; Theory of Parallels, by Matthew Ryan; Description of New Species of Pupidæ, by E. S. Morse; Proceedings of Boston Nat. Hist. Soc., Vol. X, Sheet 2. The following paper was presented. Earthquakes in California during 1865. BY DR. JOHN B. TRASK. As in the preceding year we have had much frequency in shocks of earthquake, with but trifling damage. JANUARY 9th, 7 h.—A smart shock at Santa Rosa, Sonoma County. JANUARY 19th, 8 h. 8 m.—A light shock at San Francisco. MARCH 5th, 8 h. 45 m.—A light shock at Visalia, consisting of a tremulous motion, succeeded by a roll or wave after an interval of about four seconds. MARCH 7th, 23 h.—A smart shock at San Francisco. MARCH 8th, 6 h. 22 m.—A smart shock at San Francisco. MARCH 30th, 7 h. 28 m.—A very smart shock at San Francisco; this was felt at Oakland. APRIL 15th, 0 h. 40 m.—A severe shock occurred at San Diego, consisting of three waves, following each other in quick succession; the shock was preceded with a loud rushing sound. APRIL 18th, 13 h. 31 m.—A light shock at San Francisco, and noticed at Angel Island and Oakland. This shock was severe at San Juan (south), and felt at precisely the same hour. APRIL 27th, 15 h. 56 m.—A shock at San Francisco. MAY 24th, 3 h. 21 m.—A smart shock at San Francisco, consisting of a single wave. At San Juan (south) the earthquake consisted of two sharp shocks, and at Santa Cruz of one only. At the latter localities it was three and four minutes later than at this city. SEPTEMBER 22d (no hour).—A smart shock occurred at Yreka. OCTOBER 1st, 9 h. 15 m.—A very smart shock was felt at Fort Humboldt, and throughout the district of Humboldt Bay. OCTOBER 8th, 12 h. 46 m.—A severe shock at San Francisco. This earthquake was the most violent of any occurring on this peninsula since the American occupancy, but was not sufficiently heavy to do serious damage; all the injuries sustained to property were of a trivial nature, the principal being the demolition of parts of the parapet walls erected above the roofs, to shield the latter in cases of fire in adjoining buildings; the fracture of walls in every instance occurred in insecure buildings, and heavy buildings erected on the made lands of the city front. At San José, Santa Clara, and Santa Cruz, the earthquake appears to have been equally severe as in this city. At Petaluma, on the north, it was also quite severe. At Sacramento the shock was not marked by the same severity as at the other localities mentioned. At Stockton the shock was heavy, but no damage done, nor was there any damage at Sacramento. The shock was severe at Grass Valley.