Read Ebook: Scientific American Supplement No. 362 December 9 1882 by Various

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Spinning Without a Mule.--Harris's improvements in ring spinning.

New Binding Machines. 3 figures.

Flumes and their construction. 1 figure.

Chuwab's Rolling Mill for Dressing and Rounding Bar Iron. 9 figures.

Burning of Town Refuse at Leeds. 6 figures.--Sections and elevations of destructor and carbonizer.

New Gas Burner. 3 figures.--Grimstone's improved gas burner.

Defty's Improvements in Gas Burners and Heaters. 4 figures.

The Collotype in Practice.

The Plantain as a Styptic.

Bacteria.

Domestic Electricity.--Loiseau's electric naphtha and gas lighters.--Ranque's new form of lighter with extinguisher.

Theiler's Telephone Receiver. 2 figures.

Solignac's New Electric Lamp. 3 figures.

Mondos's Electric Lamp. 2 figures.

Suggestions in Architecture.--An English country residence.

Erica Cavendishiana. 1 figure.

Philesia Buxifolia. 1 figure.

Mahogany.

The Mysteries of Lake Baikal.

Traveling Sand Hills on Lake Ontario.

Animals in the Arts.--Corals.--The conch shell.--Living beetles, etc.--Pearls.--Sepia and silk.

GUSTAVE TROUV?.

The accompanying portrait of M. Gustave Trouv? is taken from a small volume devoted to an account of his labors recently published by M. Georges Dary. M. Trouv?, who may be said to have had no ancestors from an electric point of view, was born in 1839 in the little village of Haye-Descartes. He was sent by his parents to the College of Chinon, whence he entered the ?cole des Arts et Metiers, and afterward went to Paris to work in the shop of a clock-maker. This was an excellent apprenticeship for our future electrician, since it is in small works that electricity excels; and, if its domain is to be increased, it is only on condition that the electric mechanician shall never lose sight of the fact that he should be a clock-maker, and that his fingers, to use M. Dumas's apt words, should possess at once the strength of those of the Titans and the delicacy of those of fairies. It was not long ere Trouv? set up a shop of his own, whither inventors flocked in crowds; and the work he did for these soon gave up to him the secrets of the art of creating. The first applications that he attempted related to the use of electricity in surgery, a wonderfully fecund branch, but one whose importance was scarcely suspected, notwithstanding the results already obtained through the application of the insufflation pile to galvano-cautery. What the surgeon needed was to see plainly into the cavities of the human body. Trouv? found a means of lighting these up with lamps whose illuminating power was fitted for that sort of exploration. This new mode of illumination having been adopted, it was but natural that it should afterward find an application in dangerous mines, powder mills, and for a host of different purposes. But the perfection of this sort of instruments was the wound explorer, by the aid of which a great surgeon sounded the wounds that Italian balls had made in Garibaldi's foot.

The misfortunes of France afterward directed Trouv?'s attention to military electricity, and led him to devise a perfect system of portable telegraphy, in which his hermetic pile lends itself perfectly to all maneuvers and withstands all sorts of moving about.

The small volume of which we have spoken is devoted more particularly to electric navigation, for which M. Trouv? specially designed the motor of his invention, and by the aid of which he performed numerous experiments on the ocean, on the Seine at Paris, and before Rouen and at Troyes. In this latter case M. Trouv? gained a medal of honor on the occasion of a regatta. Our engraving represents him competing with the rowers of whom he kept ahead with so distinguished success. We could not undertake to enumerate all the inventions which we owe to M. Trouv?; but we cannot, however, omit mention of the pendulum escapement that beats the second or half second without any variation in the length of the balance; of the electric gyroscope constructed at the request of M. Louis Foucault; of the electro-medical pocket-case; of the apparatus for determining the most advantageous inclination to give a helix; of the electric bit for stopping unruly horses; and of the universal caustic-holder. He has given the electric polyscope features such that every cavity in the human body may be explored by its aid. As for his electric motor, he has given that a form that makes the rotation regular and suppresses dead-centers--a result that he has obtained by utilizing the eccentrization of the Siemens bobbin.

FRIEDRICH W?HLER.

At the age of eighty-two years, and full of honor, after a life actively devoted to scientific work of the highest and most accurate kind, which has contributed more than that of any other contemporary to establish the principles on which an exact science like chemistry is founded, the illustrious W?hler has gone to his rest.

After he had worked for some time with Berzelius in Sweden, he taught chemistry from 1825 to 1831 at the Polytechnic School in Berlin; then till 1836 he was stationed at the Higher Polytechnic School at Cassel, and then he became Ordinary Professor of Chemistry in the University of G?ttingen, where he remained till his death. He was born, July 31, 1800, at Eschersheim, near Frankfort-on-the-Main.

While sojourning at Cassel, W?hler made, among other chemical discoveries, one for obtaining the metal nickel in a state of purity, and with two attached friends he founded a factory there for the preparation of the metal.

Among the works which he published were "Grundriss der Anorganischen Chemie," Berlin, 1830, and the "Grundriss der Organischen Chemie," Berlin, 1840. Nor must we omit to mention "Praktischen Uebringen der Chemischen Analyse," Berlin, 1854, and the "Lehrbuch der Chemie," Dresden, 1825, 4 vols.

At a sitting of the Academy, held on October 2, 1882, M. Jean Baptiste Dumas, the permanent secretary, with profound regret, made known the intelligence of the death of the illustrious foreign associate, Friedrich W?hler, professor in the University of G?ttingen. He said: "M. Friedrich W?hler, the favorite pupil of Berzelius, had followed in the lines and methods of work of his master. From 1821 till his last year he has continuously published memoirs or simple notes, always remarkable for their exactness, and often of such a nature that they took among contemporaneous production the first rank by their importance, their novelty, or their fullness. Employed chiefly, during his sojourn in Sweden, in work on mineral chemistry, he has remained all his life the undisputed chief in this branch of science in German universities. This preparation and preoccupation, which one might have thought sufficient to occupy his time, did not, however, prevent him from taking the chief part in the development of organic chemistry, and of filling one of the most elevated positions in it.

"His contemporaries have not forgotten the unusual sensation produced by the unexpected discovery by which he was enabled to make artificially, and by a purely chemical method, urea, the most nitrogenous of animal substances. Other transformations or combinations giving birth to substances which, until then, had only been met with in animals or plants, have since been obtained, but the artificial formation of urea still remains the neatest and most elegant example of this order of creation. All chemists know and admire the classical memoir in which W?hler and Liebig some time after made known the nature of the benzoic series, and connected them with the radicals of which we may consider them as being the derivatives comparable with products of a mineral nature. Their memoirs on the derivatives of uric acid, a prolific source of new and remarkable substances, has been an inexhaustible mine in the hands of their successors.

"The reader will pardon me a souvenir entirely personal. We were born, M. W?hler and I, in 1800. I am his senior by a few days. Our scientific life began at the same date, and during sixty years everything has combined to bind more closely the links of brotherhood which has existed for so long a time."

OUR HEBREW POPULATION.

The United Jewish Association has made a canvass of the denomination in this country, finding 278 congregations, and a total Jewish population of 230,984. New York has the largest number--80,565. Then follows Pennsylvania, with 20,000; California, with 18,580; Ohio with 14,581; Illinois, with 12,625, and Maryland, with 10,357.

The Jewish population in the largest cities is as follows:

New York 60,000 San Francisco 16,000 Brooklyn 14,000 Philadelphia 13,000 Chicago 12,000 Baltimore 10,000 Cincinnati 8,000 Boston 7,000 St. Louis 6,500 New Orleans 5,000 Cleveland 3,500 Newark 3,500 Milwaukee 3,500 Louisville 2,500 Pittsburg 2,000 Detroit 2,000 Washington 1,500 New Haven 1,000 Rochester 1,000

This total Jewish population of 230,984 has six hospitals, eleven orphan asylums and homes, fourteen free colleges and schools, and 602 benevolent lodges. Of the free schools maintained by the Hebrews, five are in New York, four in Philadelphia, and one each in Cincinnati, St. Louis, Chicago, and San Francisco. Their hospitals are in New York, Philadelphia, Baltimore, Cincinnati, New Orleans, and Chicago, while their orphan asylums, homes, and other benevolent institutions are scattered all over the country.

THE MYSTERIES OF THE BAIKAL.

The Angara is cold as ice all the summer through, so cold, indeed, that to bathe in it is to court inevitable illness, and in winter a sled drive over its frozen surface is made in a temperature some degrees lower than that prevailing on the banks. This comes from the fact that its waters are fresh from the yet unfathomed depths of the Baikal, which during the five short months of summer has scarcely time to properly unfreeze. In winter the lake resembles in all respects a miniature Arctic Ocean, having its great ice hummocks and immense leads, over which the caravan sleds have to be ferried on large pieces of ice, just as in the frozen North. In winter, too, the air is so cold in the region above the lake that birds flying across its icy bosom sometimes drop down dead on the surface. Some authors say that seals have been caught in the lake of the same character as those found in the Arctic seas; for this assertion I have no proof. An immense caravan traffic is carried across the frozen lake every season between Russia and China. To accommodate this the Russian postal authorities once established a post house on the middle of the lake, where horses were kept for travelers. But this was discontinued after one winter, when an early thaw suddenly set in, and horses, yemschliks and post house all disappeared beneath the ice, and were never seen more. In summer the lake is navigated by an antiquated steamer called the General Korsakoff, which ventures out in calm weather, but cannot face the violent storms and squalls that sometimes rise with sudden impetuosity. Irkutskians say, indeed, that it is only upon Lake Baikal and upon this old hull that a man really learns to pray from his heart. The lake is held in superstitious reverence by the natives. It is called by them Svyatoe More, or the Holy Lake, and they believe that no Christian was ever lost in its waters, for even when a person is drowned in it the waves always take the trouble to cast the body on shore.

Its length is 400 miles, its width an average of 35 miles, covers an area of 14,000 square miles and has a circumference of nearly 1,200 miles, being the largest fresh water lake in the Old World, and, next to the Caspian and the Aral, the largest inland sheet of water in Asia. Its shores are bold and rugged and very picturesque, in some places 1,000 feet high. In the surrounding forests are found game of the largest description, bears, deer, foxes, wolves, elk and these afford capital sport for the sportsmen of Irkutsk.

TRAVELING SAND HILLS ON LAKE ONTARIO.

An interesting example of sand-drift occurs near Wellington Bay, on Lake Ontario, ten miles from Pictou. The lake shore near the sand banks is indented with a succession of rock-paved bays, whose gradually shoaling margins afford rare bathing grounds. East and West Lakes, each five miles long, and the latter dotted with islands, are separated from Lake Ontario by narrow strips of beach. Over the two mile-wide isthmus separating the little lakes, the sand banks, whose glistening heights are visible miles away, are approached. On near approach they are hidden by the cedar woods, till the roadway in front is barred by the advancing bank, to avoid which a roadway through the woods has been constructed up to the eastern end of the sand range. The sand banks stretch like a crescent along the shore, the concave side turned to the lake, along which it leaves a pebbly beach. The length of the crescent is over two miles, the width 600 to 3,000 or 4,000 feet.

Clambering up the steep end of the range among trees and grapevines, the wooded summit is gained, at an elevation of nearly 150 feet. Passing along the top, the woods soon disappear, and the visitor emerges on a wild waste of delicately tinted saffron, rising from the slate-colored beach in gentle undulation, and sleepily falling on the other side down to green pastures and into the cedar woods. The whole surface of this gradually undulating mountain desert is ribbed by little wavelets a few inches apart, but the general aspect is one of perfect smoothness. The sand is almost as fine as flour, and contains no admixture of dust The foot sinks only an inch or two in walking over it; children roll about on it and down its slopes, and, rising, shake themselves till their clothing loses every trace of sand. Occasionally gusts stream over the wild waste, raising a dense drift to a height of a foot or two only, and streaming like a fringe over the steep northern edge. Though the sun is blazing down on the glistening wilderness there is little sensation of heat, for the cool lake breeze is ever blowing. On the landward side, the insidious approach of the devouring sand is well marked. One hundred and fifty feet below, the foot of this moving mountain is sharply defined against the vivid green of the pastures, on which the grass grows luxuriantly to within an inch of the sand wall. The ferns of the cedar woods almost droop against the sandy slope. The roots of the trees are bare along the white edge; a foot or two nearer the sand buries the feet of the cedars: a few yards nearer still the bare trunks disappear; still nearer only the withered topmast twigs of the submerged forest are seen, and then far over the tree tops stands the sand range. Perpetual ice is found under the foot of this steep slope, the sand covering and consolidating the snows drifted over the hill during the winter months. There is something awe-inspiring, says the correspondent of the Toronto Globe, in the slow, quiet, but resistless advance of the mountain front. Field and forest alike become completely submerged. Ten years ago a farm-house was swallowed up, not to emerge in light until the huge sand wave has passed over.

RECENT IMPROVEMENTS IN TEXTILE MACHINERY.

At the recent exhibition at Boston of the New England Institute, several interesting novelties were shown which have a promise of considerable economic and industrial value.

Fig. 1 represents the general plan and pulley connections of the Harris Revolving-Ring Spinning Frame. The purpose of the improvements which it embodies is to avoid the uneven draught of the yarn in spinning and winding incident to the use of a fixed ring. With the non-revolving ring the strain upon the yarn varies greatly, owing to the difference in diameter of the full and empty bobbin. At the base of the cone, especially in spinning weft, or filling, the diameter of the cop is five or six times that of the quill at the tip. As the yarn is wound upon the cone, the line of draught upon the traveler varies continually, the pull being almost direct where the bobbin is full, and nearly at right angles where it is empty. With the increasing angle the drag upon the traveler increases, not only causing frequent breakages of the yarn, but also an unequal stretching of the yarn, so that the yarn perceptibly varies in fineness. The unequal strain further causes the yarn to be more tightly wound upon the outside than upon the inside of the bobbin, giving rise to snarls and wastage.

These difficulties have hitherto prevented the application of ring spinning to the finer grades of yarn. They are overcome in the new spinning frame by an ingenious device by which a revolving motion is given to the ring in the same direction as the motion of the traveler, thereby reducing its friction upon the ring, the speed of the ring being variable, and so controlled as to secure a uniform tension upon the yarn at all stages of the winding.

The construction of the revolving ring is shown in Fig. 2. C is the revolving ring; D, the hollow axis support; H, a section of the ring frame; E, the traveler.

The model frame shown at the fair did its work admirably well, spinning yarns as high as No. 400, a fineness hitherto unattainable on ring frames. It is claimed that this invention can do whatever can be done with the mule, and without the skilled labor which mule spinning demands.

NEW ELECTRIC STOP MOTION.

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