Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 7, 2025
In other cases, ions are found still larger than those of saline vapours, as, for example, those produced by phosphorus. It has long been known that air in the neighbourhood of phosphorus becomes a conductor, and the fact, pointed out as far back as 1885 by Matteucci, has been well studied by various experimenters, by MM. Elster and Geitel in 1890, for instance.
This coincidence, proved by M. Arago without any exception, during several years of observation, is such that the learned Frenchman was able, without ever having been mistaken, to detect from the bottom of the cellars of the observatory of Paris the appearance of an aurora borealis. M. Matteucci had the opportunity of observing this magnetic influence under a new and remarkable form.
Yet, so far as can be judged from recent events, matters seem to have changed but little on these shores, for the mass of the population evidently preferred to pin its hope of safety to the miracle-working relics of San Gennaro, rather than to the reassuring messages of Professor Matteucci, sent from his post of undoubted peril on the mountain-side.
Other fishes the silurus, malapterurus, and so on are likewise endowed with electric batteries for stunning and capturing their prey. The action of the organs is still a mystery, as, indeed, is the whole subject of animal electricity. Nobili and Matteucci discovered that feeble currents are generated by the excitation of the nerves and the contraction of the muscles in the human subject.
They brought Angélique into contact with a voltaic battery. Then they placed on the bare arm of the child a dead frog, anatomically prepared after the manner of Matteucci, that is, the skin removed, and the animal dissected so as to expose the lumbar nerves. By a galvanic current, they caused this frog to move, apparently to revive, on the girl's arm. The effect upon her may be imagined.
That conviction had taken him as medical officer to Egypt and India, where, amid the relics of civilisations half as old as time, he found traditions of a great scientific practice; and thence it had brought him back to study such foreign medical writers as Du Bois-Reymond, Nobili, Matteucci, and Müller, and to observe the method of the famous physicians of the Salpétrière.
Equally valorous was the conduct of the great scientist, Professor Matteucci, who remained together with a few Carabinieri throughout all phases of the eruption at the Vesuvian Observatory, although in imminent peril of death amidst a deadly atmosphere of heat and sulphureous fumes.
In the glow-worm the light goes on shining for some time after the death of the insect, and even when it has become completely extinguished it can be restored for a time by the application of a little moisture. Further, both Matteucci and Phipson found that when the luminous substance was extracted from the insect it would keep on glowing for thirty or forty minutes.
For several days Professors Matteucci and Perret and their two servants had been cut off from the outside world and bombarded by the volcano, their rations consisting of bread, cheese and dried onions, until on Friday a hardy guide was induced to push through to them with some provisions.
Word Of The Day
Others Looking