On the permanency of achromatic telescopes constructed with fluid object-glasses

  • 342 Pages
  • 2.51 MB
  • English

William Blackwood, T. Cadell , Edinburgh, London
Telescopes., Astronomical instrum
Statementby Archibald Blair ; in a letter to Dr. Brewster.
SeriesLandmarks of science II
ContributionsBrewster, David, Sir, 1781-1868.
LC ClassificationsQ111 .H35, QB88 .H35
The Physical Object
Paginationp. 336-342
ID Numbers
Open LibraryOL19642128M

On the permanency of achromatic telescopes constructed with fluid object-glasses by Archibald Blair (Book) 6 editions published Real property Submerged lands Telescopes. Alternative Names.

Archibald Blair cartograaf uit Verenigd Koninkrijk van Groot-Brittannië en Ierland (). Get this from a library. On the permanency of achromatic telescopes constructed with fluid object-glasses. [Archibald Blair; David Brewster].

CMGL c. 1 bound with Joseph Jackson Lister's "On some properties in achromatic object-glasses applicable to the improvement of the microscope" and with Peter Barlow's "Construction of a fluid lens refracting telescope." CMGL c.

3 has a sheet inserted at p. "Purification of lead, oxide of lead, red lead, carbonate of : Beth Hylen. iv. ), ‘the telescope would become a new instrument.’ Blair constructed object-glasses upon this principle, of which the performance was highly praised, in one case, at least, venturing successfully upon the unexampled feat of giving to an aperture of three inches a focal length of only nine.

Archibald BlairOn the Permanency of Achromatic Telescopes Constructed with Fluid Object-Glasses Edinburgh Journal of Science, 7 (), pp. Google ScholarCited by: 2. The telescopes made with an object-glass of this kind are now commonly used, and are distinguished by the name of achromatic telescopes, a term which signifies colourless.

The object-glasses of Dolland's telescopes are composed of three distinct lenses, two of which are convex, and the other concave. Merz object-glasses Cooke and the Newall telescope The Buckingham and Craig telescopes Early work of A.

Clark and his construction of the inch Washington telescope p. Liebig's silvering process Silver-on-glass reflectors by Steinheil and Foucault Grubb's Melbourne telescope H.

Draper's success with silver-on-glass mirrors Brashear's. Marlree Castle, Co. Sligo, Ireland. 19 Astronomy in Ireland from Hearing in that Cauchoix of Paris had made an object glass of over 13 in. in diameter, Mr.

Cooper at once bought and mounted it on a wooden stand at Markree, thus securing for his infant observatory the distinction of possessing the most powerful achromatic telescope. An illustration of an open book. Books. An illustration of two cells of a film strip. Video. An illustration of an audio speaker.

Audio. An illustration of a " floppy disk. Full text of "Illustrated Descriptive Catalogue of Achromatic Microscopes, Telescopes. This banner text can have markup.

web; books; video; audio; software; images; Toggle navigation. The one characteristic all telescopes have in common is the ability to make distant objects appear to be closer.

The first optical telescope was constructed in by Dutch spectacle-maker Hans Lippershey (–). He used his telescope to view distant objects on the ground, not distant objects in space.

Mathematical and Physical Papers by Sir George Gabriel Stokes,available at Book Depository with free delivery worldwide.

also several optical problems relating to lenses of various forms and their combinations for telescopic projection, rules for finding foci, &c. He does not, however, mention the camera obscura as an instrument in use, but in John Harris's Lexicon Technicum () we find that the camera obscura with the arrangement called the "scioptric ball," and known as scioptricks, was on sale in London.

Blair's achromatic fluid object-glasses. The problem of making a perfectly achromatic object-glass has been solved by Dr Blair (Edin. Trans., vol. iii. 53) by employing fluid media, and he actually constructed an object-glass consisting of a plano-convex lens and a meniscus lens, both of crown glass with their convexities turned towards.

He constructed several early telescopes, was the first to study the heavens with them, and made monumental discoveries using them. Among these are the moons of Jupiter, the craters and mountains on the Moon, the details of sunspots, and the fact that the.

The largest refracting telescope yet made, viz., that constructed by Gautier for the Paris exhibition ofwas arranged on this plan (type F), the stars' rays being reflected along the horizontal axis re rac or of a telescope provided with visual and with photo graphic object-glasses of in. diameter and nearly ft.

focal length. Blair, Archibald. On the Permanency of Achromatic Telescopes constructed with Fluid Object-Glasses. Edinburgh Journal of Science 7 () Blakeslee, Sandra. Astronomy From the Ground Up.

Mosaic () Blanco, Victor M. Telescopes, Red Stars, and Chilean Skies. Annual Review of Astronomy and Astrophysics 39 () 1– (CTIO). Hans Lippershey of Middleburg, Holland, gets credit for inventing the refractor inand the military used the instrument o was the first to use it in astronomy.

Both Lippershey's and Galileo's designs used a combination of convex and concave lenses.

Description On the permanency of achromatic telescopes constructed with fluid object-glasses PDF

AboutKepler improved the design to have two convex lenses, which made the image upside-down. The cheapest way to build a lens is with sides that are sections of spheres.

Kepler showed that this is the wrong shape. Rays coming through the center of the lens have a different focal length than the rays coming through the edges of the lens. ACHROMATIC TELESCOPES COMPOSED OF FLUID LENSES. Blair’s fluid telescope, with an account of its performance—Barlow’s large refracting telescope with a fluid concave lens—Its construction, and the effect it produces on double stars, &c.—Rogers’ achromatic telescope on a new plan—Wilson’s telescope, &c.

page Under the general heading: “Letters to a Theorem of Mr. Euler for Correcting the Aberrations in the Object-Glasses of Refracting Telescopes,” PT 48 (–96). One letter was by James Short; other letters were Leonhard Euler, “Letters Concerning a Theorem of His, for Correcting the Aberrations in the Object-Glasses of Refracting.

achromatic. Refracting white light without breaking it up into the color of the spectrum. aperture. The diameter of the opening through which light passes in a telescope. chromatic aberration. A telescope in which the image is produced by a concave mirror or spectrum and magnified.

The object glasses of this telescope are frequently composed of three distinct lenses, two of which are convex and the other concave. Fig. [Illustration: An illustration of the object glass of an achromatic telescope, showing the two double convex and one double concave lenses.] View page [39].

2 Solution (a) The angular magnification produced by this telescope is!=−!. = (b) Since m. The first technical sheet dealing with immersion in oil dates from 12 Januaryand therefore refers to a microscope constructed in to be sent Rome.

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The microscope built for Lenoir of Vienna around Februarywith 18 object-glasses has a water-immersion V series and a VI series which uses “clear white, well-prepared poppy-seed oil.

Following the first chart of lines of equal variation compiled by Edmund Halley incharts of similar type have been published from time to time embodying recent observations and corrected for the secular change, thus providing seamen with values of the variation accurate to about 30' of arc.

Possessing these data, it is easy to ascertain by observation the effects of the iron in a ship. About the year he had completed several achromatic object-glasses, which bore an aperture of more than 2 1 2 inches, though their focal length did not exceed twenty inches.

One of these telescopes, which in was in the possession of the Rev. Smith of Charlotte Street, Rathbone Place, was examined by several gentlemen of scientific.

A significant advance in astronomy was implicit in Dolland’s telescope, though its realization waited for improvements in glass, especially in flint glass. Through the last half of the eighteenth century, achromatic telescopes with lenses over five inches in diameter.

Author of Barlow's tables of squares, cubes, square roots, cube roots, and reciprocals of all integers up to 12, Barlow's tables of squares, cubes, square roots, cube roots and reciprocals of all integer numbers up to 10, An essay on magnetic attractions, and on the laws of terrestrial and electro magnetism, Tables of squares, cubes, square roots, cube roots and reciprocals of all.

Telescopes with achromatic lenses were popular up until the late 19th century. The Three Powers of a Telescope - Light-Gathering Power - Resolving Power - Magnifying Power.

Light-Gathering Power. Refers to the ability of a telescope to collect light. Light-gathering power is proportional to the area of the telescope objective. Quekett provides an authoritative history of the microscope from ancient times to the perfection of the achromatic lens This book is a classic of the midth century and a model for contemporary text design.

In the Preface, he acknowledges the importance of the microscope as an instrument second only to the telescope.

Details On the permanency of achromatic telescopes constructed with fluid object-glasses FB2

In choosing an opera-glass, see first that the object-glasses are achromatic, although this caution is hardly necessary, for all modern opera-glasses, worthy of the name, are made with achromatic objectives.

But there are great differences in the quality of the work. If a glass shows a colored fringe around a bright object, reject it.The Compton GRO was the first telescope used for our exploration of high energy astronomy.

Galaxies look the same whether viewed in visible or x-ray wavelengths. Which type of telescope has the simplest light path? A) prime focus reflector B) achromatic refractor C) Newtonian reflector D) single lens refractor E) Cassegrain.