By Parker’s cement we’ll endeavor.
A composition has been invented by a Mr Parker, which bids fair to become one of the most important discoveries which has signalized the present century. The gentleman has compounded a cement or mortar, which, by the mere action of the air, assumes in a week or two the durability and consistence of the hardest marble and the firmest stone, and may be applied to all the purposes to which the strongest grained freestone is usually applied. Bridges, aqueducts, houses, and we suppose pavements and roads, can be as well constructed of this material as of the ordinary matters used in their composition. The ornaments and articles usually made of marble can also be made of the same materials, as it admits of a high polish, is incalculably cheaper, just as durable, much lighter, and more easily worked. It is not unlikely, that the waters of the Croton may be brought to New York in pipes and aqueducts made of this article, as it would be so much more economical than if transported thither in a canal of masonry, besides that the new canal is impervious, never leaks, and consequently no expenses for repairing would be ever incurred. There is not an article used in household matters, or for public purposes that has formerly been made of stone, but admits of the substitution of this cheaper and lighter article; and we learn that the corporation have inspected the manufacture, and are impressed with a proper sense of its importance and applicability to civic purposes.—N. Y. Mirror.
The foolish trash of Isaac Newton.
See Studies of Nature, by St Pierre, in which that scheming philosopher has, with wonderful adroitness, swept away the cobweb calculations of one Isaac Newton. Indeed, I never much admired the writings of the last mentioned gentleman, for the substantial reasons following.
In the first place, the inside of a man’s noddle must be better furnished than that of St Pierre, or he will never be able to comprehend them.
Secondly, it would be impossible to manufacture a system, like that of St Pierre, accounting for the various phenomena of nature, in a new and simple method, if one were obliged to proceed, like Newton, in his Principia, in a dull, plodding, mathematical manner, and prove, or even render probable, the things he asserts. But by taking some facts for granted, without proof, omitting to mention such as militate against a favorite theory, we may, with great facility, erect a splendid edifice of “airy nothings,” founded on hypotheses without foundation.
The said Isaac had taken it into his head that the earth’s equatorial was longer than its polar diameter. This, he surmised from the circumstance of a pendulum vibrating slower near the equator than near the pole, and from finding that the centrifugal force of the earth would not fully account for the difference between the time of the vibrations at Cayenne and at Paris.
This, with other reasons equally plausible, led him to suppose that the earth was flattened near the poles, in the form of an oblate spheroid, and that a degree of latitude would, of consequence, be greater near the pole than at the equator. Actual admeasurement coincided with that conclusion.