MOTS EN ANGLAIS EN RAPPORT AVEC «SPECULUM METAL»
speculum metal
speculum
metal
mixture
around
thirds
copper
third
making
white
brittle
alloy
that
polished
make
highly
reflective
surface
used
primarily
different
kinds
mirrors
including
early
reflecting
define
several
bronze
alloys
with
high
content
often
containing
other
materials
silver
brass
lead
zinc
arsenic
reflectors
merriam
webster
capable
taking
brilliant
polish
being
commonly
hard
various
ratios
such
oxford
dictionaries
american
meaning
pronunciation
example
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reference
defined
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10 LIVRES EN ANGLAIS EN RAPPORT AVEC «SPECULUM METAL»
Découvrez l'usage de
speculum metal dans la sélection bibliographique suivante. Des livres en rapport avec
speculum metal et de courts extraits de ceux-ci pour replacer dans son contexte son utilisation littéraire.
1
Cyclopædia of useful arts & manufactures, ed. by C. ...
Speculum metal and brass cannot be soldered together by the ordinary methods,
except on a very small scale. But they may be soldered by first fitting the brass
and speculum metal nicely together by fitting or grinding. The brass is then to be
...
Cyclopaedia, Charles Tomlinson, 1852
2
Cyclopaedia of useful arts, mechanical and chemical, ...
Speculum metal and brass camiot be soldered together by the ordinary methods,
except on a very small scale. But they may be soldered by first fitting the brass
and speculum metal nicely together by fitting or grinding. The brass is then to be
...
3
Cyclopædia of Useful Arts, Mechanical and Chemical, ...
Speculum metal and brass cannot be soldered together by the ordinary methods,
except on a very small scale. But they may be soldered by first fitting the brass
and speculum metal nicely together by fitting or grinding. The brass is then to be
...
4
The Astrophysical Journal
I made were markedly inferior to those of speculum metal through the entire
region. Hulburt finds that at X 1850 the copper was slightly better as a reflector
than the best speculum metal mirror which he tested. Nickel. — About three hours
were ...
5
Philosophical Transactions of the Royal Society of London
I give those for speculum metal and zinc. Speculum. Zinc. Red . . . . . . . . 0692
0576 Orange . . . . . . . 0-654 0594 Yellow . . . . . . . 0-632 0'602 Green . . . . . . . 0625
0-616 Blue . . . . . . . . 0-606 0-628 Indigo . . . . . . . 0-699 0-635 Violet . . . . . . . 0-593
...
6
The Scientific Papers of William Parsons, Third Earl of ...
then broken, and it was found that the speculum metal had penetrated into the
iron in various directions, and a small portion of speculum metal, when analysed,
yielded iron. The reverberatory furnace was therefore resorted to, but I found that,
...
William Parsons, Charles Parsons, 2011
7
Illustrated Dictionary of Practical Astronomy
The blank formed from speculum metal was ground and polished by the same
techniques as for metal-on-glass mirrors, but the reflecting surface was the actual
surface of the figured blank. Speculum metal reflects only about 60% of the ...
He experimented in the late 1800s with soldering speculum metal plates on a
solid brass backing fixture and then grinding the whole assembly to the proper
curve.9 Because of diffraction problems associated with the joints of the plates, ...
9
Henley's twentieth century formulas, recipes and processes
Speculum Metal.--Alloys consisting of 2 parts of co per and 1 of tin can be very
brilliant y polished, and will serve for mirrors. Good speculum metal should have
a very fine-grained fracture, should be white and very hard, the highest degree of
...
One reason why photographic reproduction is not practised to a very great extent,
is, that the modern gratings — such as Rowland's — are ruled almost universally
upon speculum metal. A grating upon speculum metal is very excellent for use, ...
3 ACTUALITÉS CONTENANT LE TERME «SPECULUM METAL»
Découvrez de quoi on parle dans les médias nationaux et internationaux et comment le terme
speculum metal est employé dans le contexte des actualités suivantes.
A guide to observing the moons of the solar system
Remember though, many of those old scopes used speculum metal mirrors which were vastly inferior to commercial optics available today. You may have a ... «Phys.Org, juil 15»
The Future Of Telescopes Is Looking Bigger And Brighter Than Ever
So people were looking around ofr a type of metal that was shiny, pretty strong, and inexpensive and they came up with an alloy called speculum metal — its an ... «Gizmodo Australia, août 14»
The next generation of giant telescopes takes shape
Known as the Leviathan of Parsonstown, this partially steerable giant housed a 72 inch mirror, then the world's largest. This telescope sported a speculum metal ... «Canada.com, juin 12»
