IMPROVED BRICK-MAKING.
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Improued Pressed Brick .uaking g-The subject of the subjoined letter is one with which we Editors cannot be supposed to be familiar. But we can and do vouch that the letter Is from very respectable source, and that its statements may be im- pli6tly relied upon.-- Nat. Intei.

 GENTLEMEN :--As your readers are all interested in every substantial improvement which takes place in our country, I have taken the liberty to send you such infor- nation as 1 possess, with respect to dis covery in the art of manufacturing brick which has been recently introduced to the notice of the public.

 A company of public-spirited individuals in the town of Mount Vernon, Ohio, have, after series of experiments, carried on for the last 3 years, finally succeeded in manufacturing the very best quality of brick from dry clay. They have a press now in operation which makes ten thousand bricks in eight hours and these of quality far superior to those made in the usual mode. By this new process the labor and hazard of drying is obviated, and the press can be worked ill all kinds of weather. The bricks are taken directly from the press to the kiln, and are, when set, ready for burning.

 It is thought by those who have careful ly examined the subject, that this new mode of manufacturing an important build ing material, has an advantage over the former process, amounting to forty per cent. We will suppose, however, that the saving to the public is only twenty-five per cent. and that there are only sixteen thousand brick houses built annually in the cities, towns, and villages of the United States. Supposing the average amount of bricks in each house to be 50,000, and the average price to be $4 per thousand. Even this would produce an annual saving ol eight hundred thousand dollars. But this Is probably less than one half the actual saving which would result to the commu- nity from general use of the machine in question.

 The circumstance which gives this inn proyement peculiar charm upon the atten- ton of the people at large, is the dirabbllii:.y durability and beauty of the building material which il brings into use. The brick have been sub- jected to all the usual tests, and are found to be capable of resisting the action of frost, water and fire to a much greater extent than those made from mortar in the usual way. Add to this, the smooth and perfect surface which they present, when laid into wall; and 1t must be admitted that little more can be desired in this branch of inl- proyement.

 1 The persons who have spent so much time and money in perfecting this highly useful machine certainly deserve we'll of the public and when the benefits resulting from their discovery shall become known, they will no doubt receive generous pat ronage. They have not, believe, yet ob- talned patent, but have taken the neces- sary steps to secure one. The names of the persons who are said to be entitled to