2d. Citizens of the United States who became actual residents of California before January 1st, 1850, and their male descendants.

3d. Honorary members admitted according to the by-laws. The society has enrolled over 1,300 members. Its historical library and museum well repay a visit. Charles D. Carter, President.

Merchant's Exchange.—This building, the commercial headquarters of the mercantile army of the Pacific, stands on the south side of California street, between Montgomery and Sansome. It ranks among the largest and finest architectural ornaments of the city.

Bank of California.—Northwest corner of California and Sansome. This elegant stone structure is not remarkable for size; but for broad and deep foundations, slow and strong construction, harmonious proportions, convenient arrangements and admirable finish within and without, it ranks among the finest and most costly business buildings in the Union. President, D. O. Mills. Cashier, William C. Ralston.

Mercantile Library Building.—North side of Bush street, between Montgomery and Sansome. This is the building for which the great lottery paid. It presents a noble front, a finely finished interior, with library room containing over 30,000 volumes, reading room, magazine room, reference room, chess room, with a large ladies' room of remarkably costly and tasteful furnishing. The hall in the basement, has already been noticed. Ogden Hoffman, President; Alfred Stebbins, Librarian.

Mechanics' Institute Building.—South side of Post street, just below Kearny. A well-proportioned, substantially built, sensible-looking building, and so far truthfully indicative of the healthful prosperity of the excellent organization which owns and occupies it. A library of nearly 20,000 volumes, including many rare and costly scientific works, a large and well-stocked reading room, a sort of museum, including mineralogical cabinets, mechanical models, scientific apparatus and works of art, with a popular business college, occupy this valuable building. The commodious hall upon the lower floor, has been previously described.

Mechanics' Pavilion.—Union Square, between Geary and Post streets on the south and north, and Stockton and Powell streets on the east and west. One of the largest, if not the largest, wooden buildings now standing in America, covering two and one half acres of ground; originally erected by the Mechanics' Institute Association, for the accommodation of their biennial fairs, and found almost indispensably convenient for all grander gatherings; it has since been retained, and successively occupied by fairs, grand masquerade balls, velocipede schools and skating rinks. The most notable event occurring under its mammoth roof was the Grand Musical Festival or Gift Concert, in aid of the Mercantile Library Association, given under the lead of Madame Camilla Urso. After the approaching Mechanics' Fair, to be held this summer, the building is to be removed.

Masonic Temple.—Upon the west side of Montgomery, at the corner of Post; of peculiar and attractive architecture, imposing proportions and elegant finish, it justly ranks among the most prominent buildings of the city.

Odd Fellows' Hall.—Montgomery street, between Pine and California. Not particularly imposing from without, but attractive from the unity, strength and benificence of the Order which it represents. Within are a library of nearly 20,000 standard and popular volumes, a well-supplied reading-room, and a well-managed savings' bank.

Y. M. C. A.—This quartette of initials has now become so well known throughout the larger cities of the Union, that the visitor in any large city is disappointed if he does not find the local habitation of this fast-spreading bond of unity among all good men. Here, upon Sutter street, just above Kearny, he will be agreeably disappointed to discover a large, new, stone-front building, unique in design, and most pleasing in its general effect. Within are library, reading-rooms, hall, gymnasium, and several convenient lodging-rooms. Chas. Goodall, President; H. L. Chamberlain, Librarian.