Periodicals Books

THE NEW MARVEL IN PHOTOGRAPHY. A VISIT TO PROFESSOR RÖNTGEN AT HIS LABORATORY IN WÜRZBURG.—HIS OWN ACCOUNT OF HIS GREAT DISCOVERY.—INTERESTING EXPERIMENTS WITH THE CATHODE RAYS.—PRACTICAL USES OF THE NEW PHOTOGRAPHY. By H.J.W. Dam. PICTURE OF AN ALUMINIUM CIGAR-CASE, SHOWING CIGARS WITHIN. From a photograph by A.A.C. Swinton, Victoria Street, London. Exposure, ten minutes. N all the history of... more...

STEAM ENGINE VALVES. By THOMAS HAWLEY. In considering the slide valve in its simple form with or without lap, we find there are certain limitations to its use as a valve that would give the best results. The limitation of most importance is that its construction will not allow of the proper cut off to obtain all the benefits of expansion without hindering the perfect action of the valve in other... more...

FARCOT'S IMPROVED WOOLF COMPOUND ENGINE. In a preceding article, we have described a ventilator which is in use at the Decazeville coal mines, and which is capable of furnishing, per second, 20 cubic meters of air whose pressure must be able to vary between 30 and 80 millimeters. In order to actuate such an apparatus, it was necessary to have a motor that was possessed of great elasticity, and... more...

THE FRENCH SCIENTIFIC STATION AT CAPE HORN. In 1875 Lieutenant Weyprecht of the Austrian navy called the attention of scientific men to the desirability of having an organized and continual system of hourly meteorological and magnetic observations around the poles. In 1879 the first conference of what was termed the International Polar Congress was held at Hamburg. Delegates from eight nations were... more...

The inauguration of the statue of Philip Lebon, the inventor of lighting by gas, occurred on the 26th of June, at Chaumont, under the auspices of the Technical Gas Society of France. The statue, which we illustrate herewith, is due to the practiced chisel of the young sculptor Antide Pechine, who has perfectly understood his work, and has represented the inventor at the moment at which he observes a... more...

TIDINGS OF MAY. The month of May is a grinning satire on the mode of living of human beings of the present day. The May sun, with its magic warmth, gives life to so much beauty, so much value. The dead, grayish brown of the forest and woods is transformed into a rich, intoxicating, delicate, fragrant green. Golden sun-rays lure flowers and grass from the soil, and kiss branch and tree into blossom and... more...

The Manor of Stoke, with its magnificent mansion and picturesque park, is situate near the village of Stoke Pogeys, in the county of Buckingham, four miles north-west of Windsor. About two miles distant from Stoke lies the village of Slough, rendered famous by the residence of the celebrated astronomer, Sir William Herschel, and a short way further, on a gentle slope continued the whole way from Stoke,... more...

ST. DUNSTAN'S, FLEET STREET. No church in London is perhaps better known than the above, which is distinctively called Saint Dunstan's in the West. External elegance has little to do with this celebrity, which has been acquired by the two wooden figures placed on a pediment in front, representing savages, who indicate the hours and quarters by striking a bell with their clubs: this has caused... more...

E. FELICE FORESTI. Late in the autumn of 1836, an Austrian brig-of-war cast anchor in the harbor of New York; and seldom have voyagers disembarked with such exhilarating emotions as thrilled the hearts of some of the passengers who then and there exchanged ship for shore. Yet their delight was not the joy of reunion with home and friends, nor the cheerful expectancy of the adventurous upon reaching a... more...

THE STORY OF JOSIAH HENSON No one ever uttered a more forceful truth than Frederika Bremer when she said in speaking to Americans: "The fate of the Negro is the romance of your history." The sketches of heroes showing the life of those once exploited by Christian men must ever be interesting to those who would know the origin and the development of a civilization distinctly American. In no case... more...