This apparatus is often known as Maxwell's colour-box, and is in fact a spectroscope reversed.
Nevertheless, by using the spectroscope and the polarimeter, I ascertained that this light did not appear to differ perceptibly from the natural light diffused by a white surface.
In fact it is not impossible that these rays are employed for the emission received on the Meudon screen, though the quality of the light when analyzed in the spectroscopemakes the supposition highly improbable.
At the eye end of the telescope is attached the spectroscope and the micrometer, and the whole set of instruments so adjusted that just the edge of the sun is seen, making a half spectrum.
These have been memorized by chemists, so that when an expert having a spectroscope sees anything burn he can tell what it is as well as read a printed page.
The slit of the spectroscope can be moved anywhere on the disk of the sun; so that if the observer sees a tornado begin, he moves the slit along with it, measures the length of its tract and velocity.
It was the presence of these black lines on the spectrum which led to the development of the spectroscope and established its significance and value.
The form of Kirchhoff's spectroscope is given in Fig.
This instrument was perfectly equipped with all gauges, scales, photographic andspectroscope accessories, and fulfilled the condition imposed in the trust deed of James Lick, of being "superior to and more powerful than any telescope made.
This spread of color is called the spectrum, and it is with the spectrum that the spectroscopehas to deal.
To state that it tells what kind of materials there are in the sun and stars, millions of miles away, seems like an unwarranted attack upon one's imagination, and yet this is one of the things that the spectroscope does.
With telescope and spectroscope he has climbed into limitless space above, and defined the size, distance, and constitution of a star millions of miles away.
You get much nearer those distant orbs when a spectroscope is placed at the end of the telescope, and the ray of light coming from sun and star is widened out into a band of color, which tells a marvelous story.
I think I am not wrong in assuming that you are somewhat acquainted with the spectroscopeand have made these discoveries.
The form of spectroscope mentioned above, in which the collimator and slit are replaced by a concave lens, will be tried.
Draper in his first experiments--a slit spectroscope from which the slit has been removed.
It exhibits lines perpendicular to the refracting edge of the prism, such as are produced in the field of an ordinary spectroscope by particles of dust upon the slit.
It was found, for example, that the spectroscope could detect the presence of a quantity of sodium so infinitesimal as the one two-hundred-thousandth of a grain.
The value of this method of observation was recognized at once, and, as soon as the spectroscope was perfected, the photographic method, in conjunction with its use, became invaluable to the chemist.
But what was even more important, the spectroscope put no limit upon the distance of location of the substance it tested, provided only that sufficient light came from it.
To render the utility of the spectroscope complete, however, it was necessary to link with it another new chemical agency--namely, photography.
The spectroscope certainly lends some countenance to Bredichin's views, but we need far more knowledge and study of comets before we shall be justly entitled to dogmatise on the subject.
My spectroscope tells me that that, too, is blood.
Besides, spectroscope tests show the presence of a rather well-known chemical in that blood.
The spectroscope 'spots' the substance, to use a police idiom, the moment the case is turned over to it.
If the poisons of the embalming fluid had not been injected, he had now clear proof regarding anything his spectroscope discovered.
In cases of poisoning by these substances, the spectroscope often has obvious advantages over chemical methods, for minute amounts will produce a well-defined spectrum.
Kennedy fingered the now set impressions, then resumed: "Before I answer that question, what else does the spectroscope show?
The applicability of the spectroscope to the differentiation of various substances is too well known to need explanation.
From the point of view of observation, improved methods in the use of the spectroscope and increase of accuracy in photometry will certainly lead to a great increase in our knowledge within the next few years.
The likeness of the sun to the stars has been shown by the spectroscope to be profound and inherent.
In this case the revelations of the spectroscoperelate only to the constitution of the gaseous envelope, and not to the body below the envelope, from which the light emanates.
This is imposed upon us by the fact that it is only when matter is in a gaseous form that the spectroscopecan give us certain knowledge as to its physical condition.
Discoveries with the spectroscope have ratified and extended this conclusion.
The analogy with the first method is closest if we use the spectroscope to give us a line of homogeneous light in simple substitution for the artificial flame.
Young, of America, invented a splendid combination of spectroscope and telescope, and Huggins of England was the first to establish by spectrum analysis the approach and retreat of the stars.
More lately the invention of the spectroscope has informed us of the very elements which go to the composition of these numberless stars, and we can distinguish those which are in a similar condition to our sun from those differing from him.
Professor left the spectroscope for a short time, and on returning half an hour later to his observations, he was astonished to find the gigantic Sun flame shattered to pieces.
Yet, even at the enormous distances with which astronomers have to deal, the spectroscope can detect such movement and furnish data for its measurement.
What the Blue "Sky" means We saw in a previous chapter how the spectroscopesplits up light-waves into their colours.
By the spectroscope we learn that this distant blaze means a prodigious outpour of white-hot hydrogen at hundreds of miles a second.
Light from any substance which has been made incandescent may be observed with the spectroscope in the same way, and each element can be thus separated.
We have seen what the spectroscope reveals about the varying nature of light wave-lengths.
But the spectroscopeenables us to answer even these questions, and the answer opens up questions of yet greater interest.
The possession of the spectroscope has enabled astronomers during later years to study the chemical composition of comets by analyzing their light.
The quiescent prominences, whose elevation is often from forty thousand to sixty thousand miles, consist, as the spectroscope shows, mainly of hydrogen and helium.
As regards the chemical composition of the Stars, it is, moreover, obvious that the powerful engine of investigation afforded us by the spectroscope is by no means confined to the substances which form part of our system.
The spectroscope answers this question in the clearest way.
Far more conflicting are the theories as to his constitution, of which indeed we may truly say very little was known before the application of photography and the spectroscope to heliography within the last seven years.
Not only can I collect the mysterious vibrations of the human brain, but I can pass them through a spectroscope more marvellous than any instrument ever dreamt of in the history of the world.
With a gesture of impatience he left the room and traversed the corridor until he came to the largest laboratory, where the Thought Spectroscope instruments were.
You know what a difficulty we had when we got over the Lithium lines in the ash of the muscular tissue of the blood, which had to be translated through the new spectroscope into actual colour upon the screen?
Here is our veritable Thought Spectroscope within this erection, which, as you will observe, is much larger than anything else I have shown you.
Light of this sort, passed through the prism of a spectroscopewill always tell the same story when the screen presents itself for analysis.
RAY: 1867, Preliminary Notice of Some Observations with the Spectroscope on Animal Substances.
