In this way the scale can be viewed by a microscope of much higher magnifying power than can be employed for the photographed spectrum.
Photographed by Professor C. D.
By the use of photography, however, it is possible to photograph the trail of a star as it transits the meridian when the telescope is directed towards the north, and another trail be similarly photographed when the telescope is directed towards the south.
The adoption of a reseau photographed upon the plate has greatly facilitated the procedure.
Vogel and his successors employed one or other form of measuring machine, provided with a microscope having single or close parallel webs which could be successively pointed on the photographed lines of the star spectrum and the lines of the terrestrial spectrum.
There he observed the transit of Venus of 1882 and photographed the great comet of that year.
2 (Plate), shows the minute complex of the tin-lead eutectic, photographed by J.
He told me about it when I photographed with him.
3 (Plate), photographed by F.
For very refined work, however, the irregularities in the reproduction of the reseau may be studied by comparing the measures of the original reseau with the mean of corresponding measures of a number of photographed copies of it.
A series of equivalent solutions all containing the same coloured ion have absorption spectra which, when photographed, show identical absorption bands of equal intensity.
Rowland to his brilliant invention of concave gratings, by which spectra can be photographed without any further optical appliance.
Really large meteors can be satisfactorily photographed, but small ones leave no impression on the plates.
If the figure be photographed as a lantern slide which is mounted so as to turn round, the wave motion is excellently shown on the screen, the compressions and extensions being represented by the crowding in and opening out of the lines.
The calcium flocculi, on account of the brilliant reversals of the H and K lines to which they give rise, and the protection to the plate afforded by the diffuse dark bands in which these bright lines occur, are easily photographed with a spectroheliograph of low dispersion.
Stothard in 1818, published in the sixth volume of Vetusta Monumenta; but in1871-1872the "tapestry" was photographed for the English education authorities by E.
The image is formed, and where it may be photographed or viewed with an eye-piece.
Fortunately, the boy ran off but the police, who were following Bryce based on our earlier tip, photographed his attempted abduction.
It was a signature day in Ouray, better than the best of the area's finest painted or photographed images with the sky so blue, the pines so green and the snow so white, you couldn't paint truer colors with an art store's inventory.
In the case of this star there is evidence that the outburst must have been extremely rapid, for the region where Nova Persei appeared had been photographed repeatedly at Harvard during February, and in particular no trace of the star was found on a plate taken on the 19th of February, which showed eleventh magnitude stars.
Among the Pagurinea is the Birgus latro, or robber-crab, whose expertness in climbing the coco-nut palm need no longer be doubted, since in recent years it has been noted and photographed by trustworthy naturalists in the very act.
This portrait was photographed for Dr Martineau's Study of Spinoza.
For example, two to five rows of globules were produced, and photographed, between the bristles of mosquito wings by using oblique illumination.
The corona was photographed at Konigsberg during the totality of the 28th of July 1851; similar records of the red prominences, successively obtained by Father Angelo Secchi and Warren de la Rue, as the shadowtrack crossed Spain on the 18th of July 1860, finally demonstrated their solar status.
This significant but evanescent phenomenon, which represents the direct emissions of a low-lying solar envelope, was photographed by William Shackleton on the occasion of an eclipse in Novaya Zemlya on the 9th of August 1896; and it has since been abundantly registered by exposures made during the obscurations of 1898, 1900, 1901 and 1905.
Hale devised on the same principle the " spectroheliograph," an instrument by which the sun's disk can be photographed in calcium-light by imparting a rapid movement to its image relatively to the sensitive plate; and the method has proved in many ways fruitful.
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.
In the instants when a sharp image of the photosphere is seen or photographed, it shows a granulated appearance like white flakes strewed fairly evenly upon a dark ground.