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Thursday, July 9, 2020 | History

3 edition of Directions for making the best composition for the metals of reflecting telescopes found in the catalog.

Directions for making the best composition for the metals of reflecting telescopes

John Mudge

Directions for making the best composition for the metals of reflecting telescopes

Together with a description of the process for grinding, polishing, and giving the great speculum the true parabolic curve. By Mr. John Mudge. Read at the Royal Society, Feb 27. March 6. and 13. 1777.

by John Mudge

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Published by printed by W. Bowyer and J. Nichols in London .
Written in English


Edition Notes

Microfilm. Woodbridge, CT Research Publications, Inc., 1986. 1 reel ; 35mm. (The Eighteenth Century ; reel 6256, no. 08).

SeriesEighteenth century -- reel 6256, no. 08.
The Physical Object
FormatMicroform
Pagination56p.,plate
Number of Pages56
ID Numbers
Open LibraryOL16927669M

On 29 May Mudge was elected a Fellow of the Royal Society, and in the same year was awarded the Copley medal for his ‘Directions for making the best Composition for the Metals for reflecting Telescopes; together with a Description of the Process for Grinding, Polishing, and giving the great Speculum the true Parabolic Curve,’ which were communicated by the author to the society, and Alma mater: King's College, Aberdeen (M.D.) (). It was first awarded in It was awarded for "the most important scientific discovery or for the greatest contribution made by experiment". The Copley Medal is the world's oldest scientific prize and it was awarded years before the first Nobel Prize. Notable winners include James Cook, Benjamin Franklin, William Herschel.

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  On 29 May Mudge was elected a fellow of the Royal Society, and in the same year was awarded the Copley medal for his ‘Directions for making the best Composition for the Metals for reflecting Telescopes; together with a Description of the Process for Grinding, Polishing, and giving the great Speculum the true Parabolic Curve,’ which were communicated by the author to the society, and . The reflecting telescope was produced by Sir Isaac Newton in It solved the problems of color correction in refractors because a mirror focuses all wavelengths at the same point. The problem with early reflectors was that they are made of metal instead of glass, and their reflectivity was poor.


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Directions for making the best composition for the metals of reflecting telescopes by John Mudge Download PDF EPUB FB2

Directions for Making the Best Composition for the Metals of Reflecting Telescopes; Together with a Description of the Process for Grinding, Polishing, and Giving the Great Speculum the True Parabolic Curve.

As the method of casting, grinding, and polishing the specula of reflecting telescopes, by Mess. Molyneux and Hadley, which is published in Dr.

Smith's Optics, is what the workmen have generally fo. Buy Directions for Making the Best Composition for the Metals of Reflecting Telescopes; And the Method of Casting, Grinding, Polishing, and Giving Them the True Parabolic Figure.

by the REV'd John Edwards, B.A. at Buy Directions for Making the Best Composition for the Metals of Reflecting Telescopes; And the Method of Casting, by the REV'd John Edwards, B.A. Published by Order of the Commissioners of Longitude. at Directions for Making the Best Composition for the Metals of Reflecting Telescopes; Together with a Description of the Process for Grinding, Polishing, and Giving the Great Speculum the True Parabolic Curve.

By Mr. John Mudge; Communicated by Alexander Aubert, Esq. Authors: Aubert, Alexander; Mudge, John: Publication. Directions for making the best composition for the metals of reflecting telescopes: And the method of casting, grinding, polishing, and giving them the true parabolic figure.

By the Rev'd John Edwards, B.A. Published by order of the Commissioners of longitude. Get this from a library. Directions for making the best composition for the metals of reflecting telescopes.: Together with a description of the process for grinding, polishing, and giving the great speculum the true parabolic curve.

By Mr. John Mudge. Read at the Royal Society, Feb March 6. an [John Mudge]. 'Directions for making the best composition for the metals of reflecting telescopes ' and 'An account of the cause and cure of the tremors particularly affecting reflecting telescopes ', with remarks by Neville Maskelyne, the Astronomer Royal.

The archives are being added to daily, and A2A recommend you return frequently. Reflecting telescopes, though not limited by the color problems seen in refractors, were hampered by the use of fast tarnishing speculum metal mirrors employed during the 18th and early 19th century—a problem alleviated by the introduction of silver coated glass mirrors in.

Telescopes come in several different varieties that include compound, reflector, and refractor bodies. Sharpness, clarity, size, and weight will all vary depending on the design, quality, and construction materials of the telescope. To make the process of buying a new telescope easier.

A) It is much easier to make a large refracting telescope than a large reflecting telescope B) Reflecting telescopes make much clearer images than can refracting telescopes of the same size C) A refracting telescope uses a transparent glass lens to focus light while a reflecting telescope uses a.

The inch (90 mm) refractor version of this telescope is our choice for planet watching. The 4-inch ( mm) Maksutov-Cassegrain hybrid version wonderfully resolves tiny point Author: David Sky Brody.

(a) Reflecting telescopes used by amateur astronomers today are similar to the one designed by Isaac Newton in the 17th century. (b) The South African Large Telescope (SALT) is one of the largest reflecting telescopes on Earth. SALT’s primary mirror consists of 91 smaller hexagonal mirrors, each with sides 1 m long.

Directions for making the best composition for the metals of reflecting telescopes. Together with a description of the process for grinding, polishing, and giving the great speculum the true parabolic curve.

By Mr. John Mudge. Read at the Royal Society, Feb March 6. an He won the Society's Copley Medal that same year for his paper on reflecting telescopes ['Directions for making the best Composition for the Metals for reflecting Telescopes; together with a Description of the Process for Grinding, Polishing, and giving the great Speculum the true Parabolic Curve', Philosophical Transactions Vol.

Directions for Making the Best Composition for the Metals of Reflecting Telescopes; Together with a Description of the Process for Grinding, Polishing, and Giving the Great Speculum the True.

composition of the glass used. They become of serious moment in the case of large, solid, thick mirrors of ordinary glass. In my opinion metallic mirrors made of cast metal alloys such as speculum- metal and “stellite” cannot properly be regarded as optical mirrors in the strict, modern sense of that term.

On account of his valuable Paper containing directions for making the best Composition for the metals of Reflecting Telescopes; together with a description of the process for grinding, polishing, and giving the best speculum the true parabolic form.

Charles Hutton. This web page provides an overview of my large homemade telescope making project. I read several telescope and mirror making books and visited many amateur telescope making or "ATM" websites to learn how to build a inch homemade telescope of this size. These sources of information provided many of the techniques I used to make the telescope.

by Richard Berry, " by ", pages, hardbound, 3rd Editon published$ ABOUT THE BOOK For anyone who has ever dreamed of exploring the heavens with a telescope, Build Your Own Telescope can make that dream come true.

In clear, step-by-step instructions, author Richard Berry tells how to build five telescopes, from a simple reflecting telescope suitable for a parent and.

When you finally start setting up your telescope, take whatever time is needed to learn its use and operation. Be sure that you have assembled everything with great care. In the beginning.found: His Directions for making the best composition for the metals of reflecting telescopes, t.p. (Mr. John Mudge) found: DNB (Mudge, John, ; physician) found: Musgrave, W.

Obit. prior to as far as relates to England, Scotland, and Ireland, (Mudge, John MD and FRS, at Plymouth, d. age 72).Solar reflective shingles are designed specifically to reduce the absorption of the suns infrared radiation by reflecting IR rays off the surface of the roof thus not allowing the heat to be transferred to the interior of the structure (i.e.

the attic under the roof).