I have a letter from the proprietor of a quarterly review, stating the effect which this change in the mode of rating pamphlet postage had upon its own circulation. Before the act of 1845, the post-office charged 14 cents per number, or 56 cents a year. Now it is 10 cents per number, or 36 cents a year. The consequence is, that where he formerly sent 100 copies by mail, yielding $56 postage, he now sends 500 copies, paying $180, increasing the income of the department $124. As there has been a material reduction in the expenditure of the department, notwithstanding a great extension of the mail routes, it is plain that the expense to the department is not at all enhanced by this additional service. As the labor of management is much diminished in the case of such large pamphlets, it is possible that future experience may show the practicability of a still greater reduction in the case of such periodicals—perhaps allowing publishers’ to _prepay_ at four cents for each half-pound. In Great Britain, there has hitherto been no separate rate of postage for pamphlets, but they have been charged at the rate of letter postage, 1_d._ per half-ounce. This is about double the present rate of pamphlet postage in the United States. The delivery of parcels by stage-coaches, railroads, and common carriers, is much more thoroughly systematized in that old country, with its dense population and limited extent, than it can be with us, on our vast territory, so new and so unfinished. Consequently, there is less necessity there for sending pamphlets by mail, and the thing is rarely done except in the case of small pamphlets, of an ounce or two weight, or in cases where despatch in transmission is important. Within the present year, however, a new rule has been introduced into the British post-office, by which “any book or pamphlet, exceeding one sheet, and not exceeding two feet in its longest dimensions, may be transmitted by post between any two places in the United Kingdom, at the uniform rate of sixpence, prepaid in stamps affixed, for each pound weight and fraction of a pound. Except in the extreme length of two feet, and that, of course, no envelope shall contain more than one copy, there is no restriction whatsoever. Families residing in the remote parts of Scotland, Wales, and Ireland, where perhaps there is no good bookseller within forty or fifty miles, may henceforward procure for themselves, direct from London, Edinburgh, or Dublin, within four or five days at furthest, any work they may happen to require, from the largest sized Bible or Atlas, to the most trifling pamphlet or school-book. A delay of twenty-four hours in the despatch, after posting, is rendered indispensable by the possibility there is of an overplus of such bulky packages on particular occasions.”