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In 1840 the King of Prussia died, and Bunsen's friend and patron, the Crown Prince, became Frederic William IV. He resembled Bunsen in more ways than one; in his ardent religious sentiment, in his eagerness, in his undoubting and not always far-sighted self-confidence and self-assertion, and in a combination of practical vagueness of view and a want of understanding men, with a feverish imperiousness in carrying out a favourite plan.
Wide as was the range of Bunsen's subsequent changes, he at this time represented the opinions of the Evangelical German Church, with the strong leaning of an amateur towards the Episcopate as a form of Government, not as the vehicle of the continuous, corporate, and visible life of the Christian Church.
In order to obviate this difficulty, the solution to which the ammonium oxalate had been added in excess is heated, and then three or four grammes more of solid ammonium oxalate are added. The hot solution, when exposed to the action of the current, deposits the cobalt as a closely adhering gray film. By the aid of two Bunsen's elements, 0.2 gramme cobalt can be separated in an hour's time.
As may be supposed, letters like Bunsen's, and the recollections of his biographer, are full of interesting gossip; notices of famous people, and of things that happened in Rome in the days of the Emancipation and Reform Bills, Revolutions of Naples in '20 and France in '30, during the twenty years, from 1818 to 1838, in which the men of the great war and the restorations were going off the scene, and the men of the modern days Liberals, High Churchmen, Ultra-montanes were coming on.
Tyndall's way of standing with his back to the audience, shutting off the view of Bunsen's hands while he was getting ready to make an artificial peal of thunder, made Humboldt laugh heartily. Humboldt thought so well of the young man who spoke German with an Irish accent, that he presented him with an inscribed copy of one of his books.
In Bunsen's philosophy, these, even more than all outward confession and ceremonial, are the true expression of the workings of the Divine Spirit in Human History. Episodes of French History during the Consulate and the First Empire. By Miss Pardoe. New York. Harper & Brothers. 12mo. pp. 361. $1.00. La Plata, the Argentine Confederation, and Paraguay.
Remembering that the direct combustion of sodium in a Bunsen's flame produces a yellow far more intense than that of the salt flame, and inferring that the intensity of the colour indicated the copiousness of the incandescent vapour, I sent through the flame from metallic sodium the beam of the electric lamp. The success was complete; and this experiment I wish now to repeat in your presence.
Hillebrand and Norton, in Bunsen's laboratory. Cerium looks like iron, having both its color and lustre, but is heavier, and has the hardness of calcite. It tarnishes slowly in dry air and rapidly in moist air. It ignites so readily that pieces scratched off inflame, and its wire burns more brilliantly than magnesium wire. Lauthanum is a little harder, but also a little lighter.
Introducing a platinum spoon with its pellet of sodium into the Bunsen's flame, the pellet first fuses, colours the flame intensely yellow, and at length bursts into violent combustion. Introducing and withdrawing the sodium flame in rapid succession, the sudden appearance and disappearance of the band of darkness is shown in a most striking manner.
"You see," said the Captain, "I use Bunsen's contrivances, not Ruhmkorff's. Those would not have been powerful enough. Bunsen's are fewer in number, but strong and large, which experience proves to be the best. The electricity produced passes forward, where it works, by electro-magnets of great size, on a system of levers and cog-wheels that transmit the movement to the axle of the screw.
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