The number of Jews in the United States is estimated at about four thousand. They have synagogues in Newport, R. I., the cities of New York, Philadelphia, Charleston, S. C., and in other parts of the country. Their mode of worship is exceedingly interesting. With regard to the number of this people in the world, Blackwood's Magazine says: --

"The statistics of the Jewish population are among the most singular circumstances of this most singular of all people. Under all their calamities and dispersions, they seem to have remained at nearly the same amount as in the days of David and Solomon -- never much more in prosperity, never much less after ages of suffering. Nothing like this has occurred in the history of any other race; Europe in general having doubled its population within the last hundred years, and England nearly tripled hers within the last half century; the proportion of America being still more rapid, and the world crowding in a constantly-increasing ratio. Yet the Jews seem to stand still in this vast and general movement. The population of Judea, in its most palmy days, probably did not exceed, if it reached, four millions. The numbers who entered Palestine from the wilderness, were evidently not much more than three; and their census, according to the German statists, who are generally considered to be exact, is now nearly the same as that of the people under Moses -- about three millions."

On the above, Judge Noah, of New York, a learned Jew, remarks: --

"We apprehend there is some error in the above statistics, and that the number of Jews throughout the world may be estimated at nearer six millions than three. There are more than a million in Poland and Russia; in all Asia, there are full two millions; half a million in Austria; in the Barbary States and Africa, a million; in all Europe, two millions and a half. We do not think, during the most splendid periods of Jewish history, that they ever exceeded four millions; but then their colonies and countries held tributary in Europe and Asia, amounted to many millions more. For example, at one period all Spain paid tribute to King Solomon; and all Spain and Portugal, at this day, are descendants of the Jews and Moors; and there are many thousands of Jews, in both those countries, now adhering in secret to the ancient faith of their fathers, while outwardly professing the Catholic religion. All the familiar Spanish and Portuguese names -- Lopez, Mendez, Carvalho, Fonseca, Rodrigues, Peirara, Azavedo, Montefiores, &c. &c. -- are of Jewish origin. Their numbers, therefore, will never be accurately known until the restoration, when thousands who, from convenience and pride, and some from apprehension, conceal their religion, will be most eager to avow it when their nation takes rank among the governments of the earth."