146) that the probable error of these measures amounted to about 2'.2 The invention of the telescope at once extended the possibilities of accuracy in astronomical measurements.
Even when, on the invention of gunpowder and firearms, the bow had fallen into disuse as a weapon of war, the prohibition was continued.
After the publication of the Plaine Discovery, Napier seems to have occupied himself with the invention of secret instruments of war, for in the Bacon collection at Lambeth Palace there is a document, dated the 7th of.
Briggs was greatly excited by Napier's invention and visited him at Merchiston in 1615, staying with him a whole month; he repeated his visit in 1616 and, as he states, "would have been glad to make him a third visit if it had pleased God to spare him so long."
The different editions of the Descriptio and Constructio, as well as the reception of logarithms on the continent of Europe, and especially by Kepler, whose admiration of the invention almost equalled that of Briggs, belong to the history of logarithms (q.v.).
His most valuable contributions to science consist in the suggestion of the astatic combination of two needles for galvanometers, and in the invention of the so-called thermomultiplier used by him and M.
The invention of the damper-pedal in the pianoforte epitomizes the difference between polyphony and symphonic art, for it is the earliest device by which sounds are produced and prolonged in a way contrary to the spirit of "real" part-writing.
In Reis's lecture an apparatus was described which has given rise to much discussion as to priority in the invention of the telephone.
The decision covered also future invention in regard to " every organized system of communication by means of wires according to any preconcerted system of signals."
To Heribert is attributed the invention of the Carroccio, which played so singular and important a part in the warfare of Italian cities.
By an invention probably due to Humfray Cole and published in 1 578 by William Bourne in his Inventions and Devices, it was proposed to register a ship's speed by means of a "little small close boat," with a wheel, or wheels, and an axle-tree to turn clockwork in the little boat, with dials and pointers indicating fathoms, leagues, scores of leagues and hundreds of leagues.
It is said that, after the invention of printing, amongst others Queen Elizabeth translated it, and that the work was well known to Shakespeare.
Roberval was one of those mathematicians who, just before the invention of the infinitesimal calculus, occupied their attention with problems which are only soluble, or can be most easily solved, by some method involving limits or infinitesimals, and in the solution of which accordingly the calculus is always now employed.
As results of Roberval's labours outside the department of pure mathematics may be noted a work on the system of the universe, in which he supports the Copernican system and attributes a mutual attraction to all particles of matter; and also the invention of a special kind of balance which goes by his name.
Ztg., 1815, May, p. 309, the first announcement of the invention in a paragraph by Captain G.
The didactic novel of Xenophon, the Cyropaedia, is a free invention adapted to the purposes of the author, based upon the account of Herodotus and occasionally influenced by Ctesias, without any independent traditional element.
He is credited with the invention of the anchor escapement for clocks, and also with the application of spiral springs to the balances of watches, together with the explanation of their action by the principle Ut tensio sic vis (1676).
He was unable to gain general acceptance of his doctrine of elements; and, strangely enough, the theory which next dominated chemical thought was an alchemical invention, and lacked the lucidity and perspicuity of Boyle's views.
1 During the twelve years that followed Morse was engaged in a painful struggle to perfect his invention and secure for it a proper presentation to the public. In poverty he pursued his new enterprise, making his own models, moulds and castings, denying himself the common necessaries of life.
In 1847 Morse was compelled to defend his invention in the courts, and successfully vindicated his claim to be called the original inventor of the electromagnetic recording telegraph.
The evolution of mathematical thought in the invention of the data of analysis has thus been completely traced in outline.
During this period logarithms were invented, trigonometry and algebra developed, analytical geometry invented, dynamics put upon a sound basis, and the period closed with the magnificent invention of (or at least the perfecting of) the differential calculus by Newton and Leibnitz and the discovery of gravitation.
Yet it would seem that this invention of Napoleon's was intuitive rather than reasoned; he never communicated it in its entirety to his marshals, and seems to have been only capable of exercising it either when in full possession of his health or under the excitement of action.
There is no reason to doubt that most of the records have at least a basis of fact, for the cases are in accord with well-attested phenomena of a similar nature at the present day; but there are others, such as the miraculous mending of a broken vase, which suggest either invention or trickery.
Immediately on its discovery intense interest was aroused in the new invention, and the chemical effects of electric currents were speedily detected.
Every day in imagination I made a trip round the world, and I saw many wonders from the uttermost parts of the earth--marvels of invention, treasuries of industry and skill and all the activities of human life actually passed under my finger tips.