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Electricity of chemical processes
Mar., 1879.]
Electricity of Chemical Processes.
207
] ) e o i p i n m . - - I n continuing his researches upon samarskite, I)elatbntaine reports the discovery of a new metal which he calls deeipium (from deeipiens, deceitful). This metal possesses many of the properties which are common to cerite and gadolinite. He believes its color to be white, although he has not yet separated it sufficiently from did.ymium to be positive on this point. Its salts are colorleas by them~elves; the acetate crystallizes very readily and appeaxs to be less ~oluble than that of didylnium but more so t h a n that of terbium.--
Comptes Rendu.~.
C.
A m e r i c a n C a r t r i d g e s . - - T h e Anmricans excel all other nations in the quality of their cartridges. The superiority is due in part to the alloys which they use, in part to the machinery, and in part to the skill Of the workmen. The Russian, French, German and Turkish Governments have sent official experts to study the American methods and intelligent mechanics to work in the American factories as journeymen. But the result has not been satisfactory ; although using the ~me processes, the cartridges which they have made are of inferior quality.--La Gaeeta Industrial.
Bridge over the :Douro.---The J,Iaria-Pia hridge, built hy Eiffel, of Paris, has a central bay of 160 meters (174"98 yards) span, the longest yet built for any but suspension bridges. The other chief :spans are the Britannia bridge, 140 meters; bridge of Kuilembourg, 150 m.; St. Louis bridge, 158"5 m. Work was begun in Jan., 1876, .and finished Oct. 31, 1877. The weight of iron is 1450 tonnes (3,196,700 lbs.), of which 750 tonnes are fbr t.he arch and 700 for the roadway and piles. The amount of masonry, is 4000 cubic metres (5232"086 cubic yards).--La Nature. C. F.,lectricity o f C h e m i c a l P r o c e s s e s . ~ F . Braun finds that the percentage of potential energy convertible into mechanical work, varies inversely with the electric tension; a sudden change in the density of free electricity must be accompanied by a development of heat even if it is not followed by any change of relative distribution ; if inductioncurrents in a spiral excite a maximum of free electricity, half of the work is converted into heat; in currents of small intensity, if a new current is added, a greater development of heat and a less degree of polarization arise when the new current is in the same direction as the original current than when the directions are opposite.--Ann, der Phys.
u. Chem.
C.
Electricity of Chemical Processes.
207
] ) e o i p i n m . - - I n continuing his researches upon samarskite, I)elatbntaine reports the discovery of a new metal which he calls deeipium (from deeipiens, deceitful). This metal possesses many of the properties which are common to cerite and gadolinite. He believes its color to be white, although he has not yet separated it sufficiently from did.ymium to be positive on this point. Its salts are colorleas by them~elves; the acetate crystallizes very readily and appeaxs to be less ~oluble than that of didylnium but more so t h a n that of terbium.--
Comptes Rendu.~.
C.
A m e r i c a n C a r t r i d g e s . - - T h e Anmricans excel all other nations in the quality of their cartridges. The superiority is due in part to the alloys which they use, in part to the machinery, and in part to the skill Of the workmen. The Russian, French, German and Turkish Governments have sent official experts to study the American methods and intelligent mechanics to work in the American factories as journeymen. But the result has not been satisfactory ; although using the ~me processes, the cartridges which they have made are of inferior quality.--La Gaeeta Industrial.
Bridge over the :Douro.---The J,Iaria-Pia hridge, built hy Eiffel, of Paris, has a central bay of 160 meters (174"98 yards) span, the longest yet built for any but suspension bridges. The other chief :spans are the Britannia bridge, 140 meters; bridge of Kuilembourg, 150 m.; St. Louis bridge, 158"5 m. Work was begun in Jan., 1876, .and finished Oct. 31, 1877. The weight of iron is 1450 tonnes (3,196,700 lbs.), of which 750 tonnes are fbr t.he arch and 700 for the roadway and piles. The amount of masonry, is 4000 cubic metres (5232"086 cubic yards).--La Nature. C. F.,lectricity o f C h e m i c a l P r o c e s s e s . ~ F . Braun finds that the percentage of potential energy convertible into mechanical work, varies inversely with the electric tension; a sudden change in the density of free electricity must be accompanied by a development of heat even if it is not followed by any change of relative distribution ; if inductioncurrents in a spiral excite a maximum of free electricity, half of the work is converted into heat; in currents of small intensity, if a new current is added, a greater development of heat and a less degree of polarization arise when the new current is in the same direction as the original current than when the directions are opposite.--Ann, der Phys.
u. Chem.
C.