equatorial mounting
equatorial mounting A telescope mounting with one axis (the
polar axis) parallel to the Earth's axis and the other (the
declination axis) at right angles to it. The telescope is attached to the declination axis. The Earth's rotation is counteracted simply by rotating the mount around the polar axis. From the mid-19th century until recently almost all large telescopes were on equatorial mountings. Some very large instruments now have computer-controlled
altazimuth mountings. Designs of equatorial mounting include the
English,
fork,
German,
horseshoe, and
Springfield mountings.
Cite this article
Pick a style below, and copy the text for your bibliography.
|
Hemlock: the graceful conifer of the West. (tree) (Wood of the Month)
Magazine article from: Wood & Wood Products; 3/1/1995; ; 700+ words
; ...tall as 270 feet. In addition to western hemlock, other hemlocks include eastern hemlock, white hemlock, Carolina hemlock, mountain...hemlock, which is sometimes called white hemlock. Hemlocks have blunt, soft needles which are j
|
|
Hemlock woolly adelgid.(PEST OF THE MONTH)
Magazine article from: Arbor Age; 2/1/2005; ; 700+ words
; ...infestation, many hemlocks are severely...and Range The hemlock woolly adelgid...Tips Planting hemlocks on appropriate sites, selecting hemlock species resistant...infested with hemlock woolly adelgid...for ornamental hemlocks is to thoroughly...
|
|
Hemlocks threatened by an unwelcome guest.(FEATURES)(CURRENTS)
Newspaper article from: The Christian Science Monitor; 8/2/2007; 700+ words
; ...restoration is possible. In the Eastern US, hemlocks come in two varieties, the Eastern hemlock in the north and the Carolina hemlock in the south. In southern Appalachia, where hemlocks tend to cluster around water, their shade...
|
|
Hemlock Semiconductor Joint Ventures to Invest up to $3.0 Billion to Expand Polysilicon Production for the Solar and Electronics Industries
Newspaper article from: U.S. Newswire; 12/15/2008; 700+ words
; ...Jarrod.Erpelding@dowcorning.com HEMLOCK, Mich. and CLARKSVILLE, Tenn., Dec. 15 /PRNewswire/ -- The Hemlock Semiconductor group, which includes...Corning Corporation joint ventures, Hemlock Semiconductor Corporation and Hemlock...
|
|
Hemlock Semiconductor Joint Ventures to Invest up to $3.0 Billion to Expand Polysilicon Production for the Solar and Electronics Industries.
PR Newswire; 12/15/2008; 700+ words
; ...addition of new site in Tennessee HEMLOCK, Mich. and CLARKSVILLE, Tenn., Dec. 15 /PRNewswire/ -- The Hemlock Semiconductor group, which includes...Corning Corporation joint ventures, Hemlock Semiconductor Corporation and Hemlock...
|
|
DYING HEMLOCKS CHANGE MOUNTAIN'S CHARACTER.(DAILY BREAK)
Newspaper article from: The Virginian Pilot; 7/25/2002; 700+ words
; ...State, losing the hemlocks will have a domino...The eastern hemlock is an important...could suffer if hemlocks die off in great...temperature. And hemlock provides cover to...affected ornamental hemlocks, but storms in...the insect to the hemlock forests of the Appalachians...
|
|
Hemlock woolly adelgid.(Pest of the Month)
Magazine article from: Landscape & Irrigation; 9/1/2007; ; 700+ words
; ...caroliniana. Unlike the hemlock species found in...widespread devastation to hemlocks throughout the East...transpiring. For large hemlocks (i.e., greater...the soil by the hemlock tree; under dry...treatment of an infested hemlock. Research data...heavily infested hemlocks can be ...
|
|
|
Hemlock Society's 10th birthday.
PR Newswire; 8/7/1990; 700+ words
; HEMLOCK SOCIETY'S 10TH BIRTHDAY EUGENE, Ore...10th anniversary of the founding of the Hemlock Society, the Society said today. On that...day most newspapers in America reported Hemlock's arrival. "Are you going to be in...
|
|
|
Hemlock Semiconductor Group Brings New Polysilicon Capacity Online for Solar and Semiconductor Industries.
PR Newswire; 5/27/2009; 700+ words
; HEMLOCK, Mich., May 27 /PRNewswire-FirstCall/ -- The Hemlock Semiconductor Group, which includes two Dow Corning...polycrystalline silicon (polysilicon) production facility at its Hemlock, Mich. location. (Photo: http://www.newscom...
|
|
|
Hemlock Semiconductor to Expand Michigan Polysilicon Operations.
PR Newswire; 5/2/2007; 700+ words
; ...in polycrystalline silicon manufacturing HEMLOCK, Mich., May 2 /PRNewswire-FirstCall/ -- Hemlock Semiconductor Corporation, the world...billion in the next 4 years to expand its Hemlock, Mich. facility. The expansion, which...
|
|
hemlock
Book article from: The Columbia Encyclopedia, Sixth Edition
hemlock any tree of the genus Tsuga...America and Asia. The common hemlock of E North America is T...light. One of the two Western hemlocks ( T. heterophylla, the tallest...construction work. The ground hemlock is a species of yew . The...
|
|
|
poison hemlock
Book article from: The Columbia Encyclopedia, Sixth Edition
poison hemlock lethally poisonous herbaceous plant...convulsions, and eventual death. Poison hemlock was used in ancient Greece in executions...philosopher Socrates. The related water hemlock (any species of Cicuta ) is similar in...
|
|
|
water hemlock
Book article from: The Columbia Encyclopedia, Sixth Edition
water hemlock see poison hemlock .
|
|
hemlock fir
Book article from: A Dictionary of Plant Sciences
hemlock fir See TSUGA .
|
|
Forest, Temperate
Book article from: Biology
...spruce, western red cedar, and western hemlock; (2) montane evergreen forests of the...northeastern deciduous beech-maple-hemlock forests; and (6) northern pine forests...soils (oak and pine), to rare fire (hemlock, maple, and beech-dominated forests...
|
