Herschel sentence example
Beyond the introduction of the spider line it is unnecessary to mention the various steps by which the Gascoigne micrometer assumed the modern forms now in use, or to describe in detail the suggestions of Hooke, 4 Wren, Smeaton, Cassini, Bradley, Maskelyne, Herschel, Arago, Pearson, Bessel, Struve, Dawes, &c., or the successive productions of the great artists Ramsden, Troughton, Fraunhofer, Ertel, Simms, Cooke, Grubb, Clarke and Repsold.
Sir William Herschel was the first astronomer who measured position angles; the instrument he employed is described in Phil.
While still an undergraduate he formed a league with John Herschel and Charles Babbage, to conduct the famous struggle of "d-ism versus dot-age," which ended in the introduction into Cambridge of the continental notation in the infinitesimal calculus to the exclusion of the fluxional notation of Sir Isaac Newton.
The treatises on physical geography by Mrs Mary Somerville and Sir John Herschel (the lattewritten for the eighth edition of the Encyclopaedia Britannica) showed the effect produced in Great Britain by the stimulus of Humboldt's work.
Herschel marshals the evidence which can be collected on this point.Advertisement
He arranges a selection from his observations on the nebulae in such a way as to give great plausibility to his view of the gradual transmutation of nebulae into stars Herschel begins by showing us that there are regions in the heavens where a faint diffused nebulosity is all that can be detected by the telescope.
It seemed to Herschel that he was thus able to view the actual changes by which masses of phosphorescent or glowing vapour became actually condensed down into stars.
In attempting to pronounce on the evidence with regard to Herschel's theory, we must at once admit that the transmutation of a nebula into a star has never been seen.
It is indeed very doubtful whether any changes of a nebula have ever been seen which are of the same character as the changes Herschel's theory would require.
See The Memoir and Correspondence of Caroline Herschel, by Mrs John Herschel (1876).Advertisement
Herschel, had the chief part in shaping its constitution.
The same thought appears in a review of Herschel's Natural Philosophy, written about the same time.
It was in 1837, on reading Whewell's Inductive Sciences and re-reading Herschel, that Mill at last saw his way clear both to formulating the methods of scientific investigation and joining on the new logic as a supplement to the old.
It has been found by Sir William Herschel and others that the definition of a telescope is often improved by stopping off a part of the central area of the object-glass; but the advantage to be obtained in this way is in no case great, and anything like a reduction of the aperture to a narrow annulus is attended by a development of the external luminous rings sufficient to outweigh any improvement due to the diminished diameter of the central area.'
The diminution of the star disks with increasing aperture was observed by Sir William Herschel, and in 1823 Fraunhofer formulated the law of inverse proportionality.Advertisement
The objection raised by Herschel (Light, § 703) to this comparison depends on a misconception.
In 1789 Klaproth isolated from pitchblende a yellow oxide which he viewed as the oxide of a new metal, which he named uranium, after the newly discovered planet of Herschel.
Of 80 comets seen during the 20 years ending 1893, Professor Herschel found that only two, viz.
A valuable edition of the De aquis (text and translation) has been published by C. Herschel (Boston, Mass., 1899).
Science, 1825); Herschel's instrument has since been discarded in favour of the pyrheliometer (Gr.Advertisement
Sir John Herschel took as the northern boundary of the southern ocean the greatest circle which could touch the southernmost extremities of the three southern continents.
It is the birthplace of Sir William Herschel, the astronomer, of the brothers Schlegel, of Ifliand and of the historian Pertz.
Some curious examples of echo are given in Herschel's article on " Sound " in the Encyclopaedia Metropolitana, but it appears that he is in error in one case.
The first constructor of reflecting telescopes on a large scale, William Herschel, never published anything about his methods of casting and polishing specula, and he does not appear to have been very successful beyond specula of 18 in.
In September 1839 a 3-foot speculum was finished and mounted on an altazimuth stand similar to Herschel's; but, though the definition of the images was good (except that the diffraction at the joints of the speculum caused minute rays in the case of a very bright star), and its peculiar skeleton form allowed the speculum to follow atmospheric changes of temperature very quickly, Lord Rosse decided to cast a solid 3-foot speculum.Advertisement
Herschel, who discovered that many of them formed systems of two stars revolving round their common centre of gravity.
Herschel (and for some time Sir James South) had observed them, but their labours were eclipsed by Struve.
About the year 1774 William Herschel, then a teacher of music in Bath, began to occupy his leisure hours with the construction of specula, and finally devoted himself entirely to their construction and use.
Assuming with Sir William Herschel.
This form was adopted by the - elder Herschel to avoid the loss of light from reflection in the small mirror of the Newtonian telescope.
The first attempt to determine the solar apex (as the point towards which the solar motion is directed is termed) was made in 1783 by Sir William Herschel.
His influence on his successors has rather lain in the general stimulus of his enthusiasm for experience, or in the success with which he represents the cause of nominalism and in certain special devices of method handed down till, through Hume or Herschel, they affected the thought of Mill.
In one of his numerous incidental essays he propounded, in 1776, a theory of the solar constitution similar to that developed in 1795 by Sir William Herschel.
The results of these skilfully conducted observations were published in a memoir on The Uranian and Neptunian Systems. 3 From this research it appears that the orbits of all four satellites of Uranus are sensibly circular, and although no special search was made, he concludes that none of Sir William Herschel's supposed outer satellites can have any real existence.
Herschel, Peter Barlow and others, but did not receive a final explanation until after the discovery of electromagnetic induction by Faraday in 1831.
Freedom from aberration for two axis points, one of which is infinitely distant, is known as " Herschel's condition."
Along with Sir John Herschel and George Peacock he laboured to raise the standard of mathematical instruction in England, and especially endeavoured to supersede the Newtonian by the Leibnitzian notation in the infinitesimal calculus.
There is more than one meaning of William Herschel discussed in the 1911 Encyclopedia.
His last subject of investigation was the motion of balloons, and the last subject on which he conversed was the newly discovered planet Herschel (Uranus).
As early as 1839 a scheme of public schools, drawn up by Sir John Herschel, the astronomer, came into operation, and was continued until 1865, when a more comprehensive scheme was adopted.
The change from slave to free labour proved to be advantageous to the farmers in the western provinces; an efficient educational system, which owed its initiation to Sir John Herschel, the astronomer (who lived in Cape Colony from 1834 to 1838), was adopted; Road Boards were established and did much good work; to the staple industries - the growing of wheat, the rearing of cattle and the making of wine - was added sheepraising; and by 1846 wool became the most valuable export from the country.
The latter was struck by the coincidence, and mentioned it to the Board of Visitors of the Observatory, James Challis and Sir John Herschel being present.
Herschel, at the ensuing meeting of the British Association early in September, ventured accordingly to predict that a new planet would shortly be discovered.
On the announcement of the fact, Herschel and Challis made known that Adams had already calculated the planet's elements and position.
His bust, by the same sculptor, stands opposite that of Sir John Herschel in the hall of St John's College, Cambridge.
His first work, An Elementary Treatise on Mechanics (1819), co-operated with those of Peacock and Herschel in reforming the Cambridge method of mathematical teaching; to him in large measure was due the recognition of the moral and natural sciences as an integral part of the Cambridge curriculum (1850).
Uranus was recognized specula of continually augmented size, up to a diameter 4 p pp Herschel.
These were incidental trophies; Herschel's main object was the exploration of the sidereal heavens.
Charles Messier (1730-1817) had catalogued in 1781 103 nebulae; Herschel discovered 2500, laid down the lines of their classification, divined the laws of their distribution, and assigned their place in a scheme of development.
Sir John Herschel continued in the Sir John northern, and extended to the southern hemisphere, Herschel.
William Herschel founded his determination in 1 783 of the sun's route in space upon the movements of thirteen stars; and he took into account those of only six in his second solution of the problem in 1805.
About seventy analogous objects, including that in the Sword of Orion, were found by him to give light of the same quality; and thus after seventy-three years, verification was brought to William Herschel's hypothesis of a " shining fluid " diffused through space, the possible raw material of stars.
Some bright spots are visible by the earth-light when the moon is a thin crescent, which were supposed by Herschel to be volcanoes in eruption.
There he remained till 1855, when he succeeded Sir John Herschel as Master of the Mint, a post he held until his death on the 16th of September 5869.
He was led to his three great laws by musical analogies, just as William Herschel afterwards passed from music to astronomy.
It is Herschel's supply of superfluid helium which dictates how long its operational lifespan will be.
Herschel said that it was an extremely informative document.
The telescope was completed on 28th August 1789 and on that first night, Herschel discovered two new moons of Saturn.
Caroline Herschel was rescued by William from a life of domestic servitude under her mother in Hanover.
On the other hand, scientific men, such as Herschel, Maxwell and Stokes, who approach nature from mathematics and mechanics, and therefore from the universal laws of motion, have the opposite tendency, because they perceive that nature is not its own explanation.
Chancery affidavit sworn by Sir John F. W. Herschel on 25 May 1854 in the case of Talbot v.