Huggins Sentence Examples
The method originally used by Huggins, who first conceived and proved the possibility of measuring stellar velocities in the line of sight, was to measure with a filar micrometer the displacement of some well-known line in a stellar spectrum relative to the corresponding line of a terrestrial spectrum.
In the last quarter of the 19th century spectroscopy and photography together worked a revolution in observational astronomy, and in both branches Huggins acted as pioneer.
In solar physics Huggins suggested a spectroscopic method for viewing the red prominences in daylight; and his experiments went far towards settling a much-disputed question regarding the solar distribution of calcium.
This circumstance appeared so anomalous that some astronomers doubted whether the surviving lines were really due to calcium; but Sir William and Lady Huggins (née Margaret Lindsay Murray, who, after their marriage in 1875, actively assisted her husband) successfully demonstrated in the laboratory that calcium vapour, if at a sufficiently low pressure, gives under the influence of the electric discharge precisely these lines and no others.
Sir William Huggins, who was made K.C.B.Advertisement
Sir William Huggins died on the 12th of May 1910.
Huggins, expressed the opinion that the proposed exemption was not beneficial to science students.
Balmer's formula received a striking confirmation when it was found to include the ultra-violet lines which were discovered by Sir William Huggins' in the photographic spectra of stars.
When we compare together electric discharges the intensity of which is altered by varying, the capacity, we are unable to form an opinion as to whether the effects observed are due to changes in the density of the luminous material or changes of temperature, but the experiments of Sir William and Lady Huggins 1 with the spectrum of calcium are significant in suggesting that it is really the density which is also the determining factor in cases where different concentrations and different spark discharges produce a change in the relative intensities of different lines.
There ensued a general classification of the stars by Secchi into four leading types, distinguished by diversities of spectral pattern; and the recognition by Huggins of a considerable number of terrestrial elements as present in stellar atmospheres.Advertisement
Sir William Huggins repeated the experiment on Winnecke's comet in 1868, Progress only with long exposures could autographic im ?'
The first conspicuous triumph of the new " spectrographic " art thus established was the record by Huggins in 1879 of the dispersed light of several " white " or Sirian stars, in which the chief traits of absorption were the rhythmical series of hydrogen-lines, then memorably discovered.
Again by Sir William Huggins, the spectrum of the Orion nebula was photographed on the 7th of March 1882; and the method has gradually become nearly exclusive in the study of nebular emanations.
This subtle mode of research was made available by Sir William Huggins in 1868.
The adoption, by Sir William Huggins in 1876, of gelatine or dry plates in celestial photography was a change of decisive import.Advertisement
The transition in interaural phase defining the Huggins pitch creates the discontinuity in the tracks around 600 Hz.
But the wet collodion process was then the only one available, and its inconveniences were such as to preclude its extensive employment; the real triumphs of photographic astronomy began in 1875 with Huggins's adoption and adaptation of the gelatine dry plate.
She is currently working on the movie Beezus and Ramona, in which she plays Beatrice (Beezus) Quimby, the popular character from the Ramona and Henry Huggins books by author Beverly Cleary.