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Arts and Sciences.

The London Smoke Nuisance-Furnace Cinders—The procured. The largest piece obtained weighed Dahlia-Adamant-State of the Natural Sciences

about 66 grains. Its edges were rounded by among the Japanese-Electricity.

long continued friction; and it presented a We stated lately that by act of Parliament slightly brownish, dull black color. When the smoke of London is “suppressed." A sci- | viewed with a microscope, it appeared riddled entific writer in the London Times thinks the with small cavities, which separated very small reform begins at the wrong end: that the sewers, irregular laminæ, slightly transparent and iri&c., should be first so arranged as not to infect descent. It cut glass readily, and scratched the atmosphere--the smoke is necessary to quartz and topaz. On analysis it was found counteract them. Smoke, he argues, is nothing that this adamant contains 96.8 to 90.8 per more than minute flakes of carbon or charcoal. cent. of pure carbon; the small remainder conCarbon in this state is like so many atoms of sisting of vegetable ash. sponge, ready to absorb any of the life-destroy.

M. Von Siebold, at a late meeting of the Natu. ing gases with which it may come in contact. In all the busy haunts of men, or wherever

ral History Society of Bonn, read a paper " On men congregate together, the surrounding air

| the State of the Natural Sciences among the is to a certain extent rendered pernicious by

Japanese." Their knowledge of these sciences, their excretions, from which invisible gaseous

he says, is much more extensive and profound matter arises, such as phosphuretted and sul

than is supposed in western Europe. They posphuretted hydrogen, cyanogen, and ammoniacal

sess a great many learned treatises thereupon,compounds, well known by their intolerable

and an admirable geological map of their island, odor. Now, the blacks of smoke (that is the

by Buntsjo. They are well acquainted with carbon) absorb and retain these matters to a

the systems of European naturalists, and have wonderful extent. Every hundred weight of

translations of the more important of their smoke probably absorbs twenty hundred weight

works. They have a botanical dictionary, in of the poisonous gases emanating from the sew

which an account is given of not fewer than ers, and from the various works where animal

5,300 species, and it is embellished with a vast. substances are under manipulation-by fell

number of well-executed engravings. The flora mongers, for instance, and on the premises of

of their own island is admirably described in a fat-melters, bone-crushers, glue-makers, Prus

work by the imperial physician, Pasuragawa. sian blue-makers, &c. This accounts for the Some experiments have lately been made at undeniable fact that London, although the most

Portsmouth (England) of a most important smoky, is yet the healthiest metropolis in the and remarkable character, and which would world. As London is at present constituted,

appear to open up and promise to lead to further smoke is the very safeguard of the health of

triumphs in electricity, equal in importance to the population; it is unquestionably the me

any that have already been achieved. The exchanical purifyer of a chemically deteriorated

periments in question were for the purpose of atmosphere.

ascertaining the possibility of sending electric The London Athenqum reports very favorably telegraph communications across a body of the result of experiments in England, testing water without the aid of electric wires. The our countryman, Dr. Smith's, invention for the space selected for the experiment was the milluse of Furnace Cinders. Dr. Smith professes to dam, (a piece of water forming a portion of the produce from the scoriæ cast aside from the fortifications,) at its widest part, where it is blast furnaces a variety of articles in daily use, something near five hundred feet across. The such as square tiles, paving flags, and bottles, operating battery was placed on one side of the the last of which are much stronger, and the dam, and the corresponding dial on the other annealment more complete than in the common side. An electric wire from each was subglass bottles, from which in appearance they merged on their respective sides of the water, are scarcely to be distinguished. The scoriæ and terminating in a plate constructed for the are thrown into a mold before they have time | purpose, and several messages were accurately to cool. If it should turn out to be possible to conveyed across the entire width of the millput the furnace cinders to such uses, the inven- dam, with accuracy and instantaneous rapidity. tion will be of great importance to all propri

The apparatus employed in the experiments is etors of blast furnaces.

not pretended to be here explained in even & The dahlia is a native of the marshes of

cursory manner; this is of course the exclusive

secret of the inventor. But there is no doubt Peru, and was named after Dahl, the famous

of the fact that communications were actSwedish botanist. It is not more than thirty

ually sent a distance of nearly five hundred years since its introduction into Europe.

feet through the water without the aid of wires, Adamant is a substance so extremely hard or other conductors, and that there appeared as to be able to polish the diamond. It is con every possibility that this could be done as sidered to bear the same relation to diamond easily with regard to the British Channel as which emery does to corundum. A few years with the mill-dam. The inventor is a gentleago, M. Dufresney exhibited before the Paris man of great scientific attainments, residing in Academy of Sciences, a few pieces of adamant Edinburgh, and lays claim to being the original which were met with in the same alluvial for- inventor of the electric telegraph ; but was unmation whence Brazilian diamonds are usually able to carry out the invention to his advantage.

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