The product of gold continues to be great. The report of the new gold bluffs, mentioned in our last Number, is confirmed; but the access to them is so difficult that they will not probably be soon available. They are situated near the mouth of the Klamath River, about thirty miles north of Trinidad. The approach to them by land is over a plain of sand, into which the traveler sinks ankle-deep at every step. The bluffs stretch along some five or six miles, and present a perpendicular front to the ocean of from 100 to 400 feet in height. In ordinary weather the beach at the foot is from 20 to 50 feet in width, composed of a mixture of gray and black sand, the latter containing the gold in scales so fine that they can not be separated by the ordinary process of washing; so that resort must be had to chemical means. The beach changes with every tide, and sometimes no black, auriferous sand is to be seen on the surface. By digging down, it is found mixed with a gray sand, which largely predominates. The violence of the surf renders landing in boats impracticable. Several tons of goods were landed from a steamer dispatched thither, by means of lines from the vessel to the shore. The Pacific Mining Company claim a large portion of the beach, and have made preparations for working the bluffs, and are sanguine of an extremely profitable result.

Specimens of gold in quartz have been submitted to assay, which have proved very rich. Operations in the "dry diggings" have been much retarded by the absence of rain. Large quantities of sand have been thrown up, ready to take advantage of the earliest showers to wash it out.

A bill to remove the State Capital from San José to Vallejo has passed the Senate, but has not been acted upon in the House. A project has been started for a railroad from San José to San Francisco. The receipts into the city treasury of San Francisco, for the quarter ending Nov. 30, were $426,076, and the expenditures $638,522. The total debt of the city was $536,493. No election for U. S. Senator had taken place. The choice will undoubtedly fall upon Mr. Frémont or T. Butler King. The Whigs seem confident of success. An expedition was dispatched toward the close of October to explore the Colorado River from its mouth. They have been heard from about 30 miles up the stream, to which point they had ascended without difficulty. They believe the Colorado to be navigable for steamboats, during the greater portion of the year, as high as the mouth of the Gila.

MEXICO AND SOUTH AMERICA.

Señor Munguia, the new Bishop of Michoacan, has refused to take the oaths required by Government, throwing himself upon the rights and privileges granted to the clergy, upon the first establishment of Christianity in Mexico.——Great complaints are made of the inefficiency of the police in the capital. On the 3d of January a band of armed robbers attacked the promenaders on the Paseo, rifling them of their money and valuables.——Chihuahua was greatly alarmed by the report that a band of American adventurers and Indians were encamped at a distance of 25 leagues. The band is said to be well armed, having two field-pieces. From the description of the leader he is supposed to be the notorious Captain French.——The affairs of Yucatan are in a situation almost desperate. The Indians are waging fierce hostilities, which have prevented the transportation of provisions. The treasury is exhausted, the army without pay, and almost reduced to starvation.——A poetical work, by a young Mexican woman, is advertised. It is entitled the "Awakener of Patriotism," and narrates the history of the late war with the United States.

Hostilities have broken out between the central Government of Guatemala on the one hand, and the allied States of San Salvador and Honduras on the other. A battle took place on the 21st of January at a village called San José, when the forces of San Salvador and Honduras were totally routed, and fled in every direction, closely pursued by the victors. Such, at least, is the Guatemalan account, which is the only one that has yet reached us.

Attention has recently been turned to the gold region of New Grenada, portions of which have been found to be extremely productive. The districts richest in gold are said to be extremely unhealthy.

From Nicaragua we learn that the survey of the route from Lake Nicaragua to the Pacific is nearly completed. The distance is 12 miles, and the highest point only 40 feet. The steamer Director is running on the lake. A complete steam communication will in a few weeks be effected between the lake and the Atlantic; a canal of 12 miles will unite the lake with the Pacific. When lines of steamers are established on both sides of the Isthmus, connecting with this rout across, it is anticipated that the passage from New York to San Francisco may be made in 24 days.

Carthagena was visited on the 7th of February by a severe shock of an earthquake, which lasted nine seconds. Considerable damage was done throughout the city; some houses were thrown down, and several lives lost. The city walls and the Cathedral were much injured. Had the shock been protracted a few seconds longer, the whole city would have been laid in ruins. On the night of the 8th the public squares and walks were filled with people who had left their dwellings in dread of a repetition of the shock. But up to the 15th none had occurred. No city in the region felt the shock so severely as did Carthagena.

In Peru, Congress was to meet March 20. The Presidential election has terminated in favor of Echenique.