Vertical Pendulum Tilt Meter - Revision history

FS at 16:12, 16 April 2022

2022-04-16T16:12:12Z

FS at 16:11, 16 April 2022

2022-04-16T16:11:55Z

FS at 16:10, 16 April 2022

2022-04-16T16:10:59Z

FS at 16:10, 16 April 2022

2022-04-16T16:10:28Z

Peter at 11:38, 15 April 2022

2022-04-15T11:38:33Z

FS at 17:46, 25 August 2021

2021-08-25T17:46:03Z

FS at 17:43, 25 August 2021

2021-08-25T17:43:10Z

FS at 17:40, 25 August 2021

2021-08-25T17:40:42Z

FS at 17:39, 25 August 2021

2021-08-25T17:39:42Z

FS at 17:38, 25 August 2021

2021-08-25T17:38:15Z

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 In-Place Tilt Meters measure uniaxial or biaxial tilt, which is measured from the plane(s) perpendicular to the base.
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 "The Observatory’s two levels of cellars and other features made it especially suited for calibrating chronometers under controlled conditions of temperature and seismic vibrations."<ref name="stephen">Stephen Pickles, A brief history of Bidston Observatory, 2016 http://www.bidstonobservatory.org.uk/a-brief-history-of-bidston-observatory/</ref>

← Older revision		Revision as of 16:11, 16 April 2022
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		+	In-Place Tilt Meters measure uniaxial or biaxial tilt, which is measured from the plane(s) perpendicular to the base.
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		+	---
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	"The Observatory’s two levels of cellars and other features made it especially suited for calibrating chronometers under controlled conditions of temperature and seismic vibrations."<ref name="stephen">Stephen Pickles, A brief history of Bidston Observatory, 2016 http://www.bidstonobservatory.org.uk/a-brief-history-of-bidston-observatory/</ref>		"The Observatory’s two levels of cellars and other features made it especially suited for calibrating chronometers under controlled conditions of temperature and seismic vibrations."<ref name="stephen">Stephen Pickles, A brief history of Bidston Observatory, 2016 http://www.bidstonobservatory.org.uk/a-brief-history-of-bidston-observatory/</ref>

← Older revision		Revision as of 16:10, 16 April 2022
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	"The NSA (National Seismographic Archive) holds the <u>ex-Bidston Milne-Shaws</u>, examples of modern Willmore instruments, and probably the only Jaggar shockrecorder in existence."<ref>''Historical Seismological Observatories in the British Isles'', British Geological Survey, 1999 http://www.earthquakes.bgs.ac.uk/hazard/pdf/wl9913.pdf</ref>		"The NSA (National Seismographic Archive) holds the <u>ex-Bidston Milne-Shaws</u>, examples of modern Willmore instruments, and probably the only Jaggar shockrecorder in existence."<ref>''Historical Seismological Observatories in the British Isles'', British Geological Survey, 1999 http://www.earthquakes.bgs.ac.uk/hazard/pdf/wl9913.pdf</ref>

−	[[category: Instruments\|Stories]]	+	[[category: Instruments]]
		+	[[category: Stories]]

← Older revision		Revision as of 16:10, 16 April 2022
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	"The NSA (National Seismographic Archive) holds the <u>ex-Bidston Milne-Shaws</u>, examples of modern Willmore instruments, and probably the only Jaggar shockrecorder in existence."<ref>''Historical Seismological Observatories in the British Isles'', British Geological Survey, 1999 http://www.earthquakes.bgs.ac.uk/hazard/pdf/wl9913.pdf</ref>		"The NSA (National Seismographic Archive) holds the <u>ex-Bidston Milne-Shaws</u>, examples of modern Willmore instruments, and probably the only Jaggar shockrecorder in existence."<ref>''Historical Seismological Observatories in the British Isles'', British Geological Survey, 1999 http://www.earthquakes.bgs.ac.uk/hazard/pdf/wl9913.pdf</ref>

−	[[category:~~stories~~]]	+	[[category: Instruments\|Stories]]

← Older revision		Revision as of 11:38, 15 April 2022
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	"The NSA (National Seismographic Archive) holds the <u>ex-Bidston Milne-Shaws</u>, examples of modern Willmore instruments, and probably the only Jaggar shockrecorder in existence."<ref>''Historical Seismological Observatories in the British Isles'', British Geological Survey, 1999 http://www.earthquakes.bgs.ac.uk/hazard/pdf/wl9913.pdf</ref>		"The NSA (National Seismographic Archive) holds the <u>ex-Bidston Milne-Shaws</u>, examples of modern Willmore instruments, and probably the only Jaggar shockrecorder in existence."<ref>''Historical Seismological Observatories in the British Isles'', British Geological Survey, 1999 http://www.earthquakes.bgs.ac.uk/hazard/pdf/wl9913.pdf</ref>
		+
		+	[[category:stories]]

← Older revision		Revision as of 17:46, 25 August 2021
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−	"The Observatory’s two levels of cellars and other features made it especially suited for calibrating chronometers under controlled conditions of temperature and seismic vibrations."<ref name="stephen"></ref>	+	"The Observatory’s two levels of cellars and other features made it especially suited for calibrating chronometers under controlled conditions of temperature and seismic vibrations."<ref name="stephen">Stephen Pickles, A brief history of Bidston Observatory, 2016 http://www.bidstonobservatory.org.uk/a-brief-history-of-bidston-observatory/</ref>

	"[A] new activity commenced in '''1897''' with the installation in the cellars of a seismograph. This was the first of a series of seismographs of different designs that followed."<ref name="baker">Bidston Observatory: Earth Tides and Ocean Tide Loading, Trevor F. Baker, 2 November 2016 http://www.bidstonobservatory.org.uk/earth-tides/</ref>		"[A] new activity commenced in '''1897''' with the installation in the cellars of a seismograph. This was the first of a series of seismographs of different designs that followed."<ref name="baker">Bidston Observatory: Earth Tides and Ocean Tide Loading, Trevor F. Baker, 2 November 2016 http://www.bidstonobservatory.org.uk/earth-tides/</ref>

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-"The Observatory’s two levels of cellars and other features made it especially suited for calibrating chronometers under controlled conditions of temperature and seismic vibrations."<ref name=stephen"></ref>
+"The Observatory’s two levels of cellars and other features made it especially suited for calibrating chronometers under controlled conditions of temperature and seismic vibrations."<ref name="stephen"></ref>
 "[A] new activity commenced in '''1897''' with the installation in the cellars of a seismograph. This was the first of a series of seismographs of different designs that followed."<ref name="baker">Bidston Observatory: Earth Tides and Ocean Tide Loading, Trevor F. Baker, 2 November 2016 http://www.bidstonobservatory.org.uk/earth-tides/</ref>
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 [[File:Milne.jpg|thumb|none|Tone Harikaw with her husband, seismologist Prince Boris Galitzin and John Milne (center) in 1910.]]
-""In '''1910''', observations were made <u>using instruments designed by Sir George Darwin, Sir Horace Darwin and others</u> to determine the yielding of the land to the load of tidal water, now called the ‘ocean loading effect’."<ref name="baker"></ref>
+"In '''1910''', observations were made <u>using instruments designed by Sir George Darwin, Sir Horace Darwin and others</u> to determine the yielding of the land to the load of tidal water, now called the ‘ocean loading effect’."<ref name="baker"></ref>
-''Could this be the <ul>Prof J. A. Ewing’s Seismograph</ul> produced by Horace Darwin?''<ref>https://www.christs.cam.ac.uk/horace-darwin-1851-1928</ref>
+''Could this be the <u>Prof J. A. Ewing’s Seismograph</u> produced by Horace Darwin?''<ref>https://www.christs.cam.ac.uk/horace-darwin-1851-1928</ref>
 "As a result of the successful tests with the <u>Claustral Pendulum</u>, Bidston acquired a <u>Graf-Askania vertical pendulum</u> of its own, and installed it after modification." <ref>Joyce Scoffield, ''Bidston Observatory, The Place and the People''. p328</ref>

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 [[File:Glasses.jpg|thumb|none|Photograph of a scientist with tiltmeter in situ, installed in the cellar of BOAC (2021)]]
-[[File:Milne-Shaw.jpg|thumb|none|A Milne–Shaw seismograph in use at 'the Honolulu station' in Hawaii. (b) is the same instrument as shown in (a), but with the cover on. [https://prd-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Preserving%20Historic%20Earthquake%20Records-%206.gif USGS]]]
+[[File:Milne-Shaw.gif|thumb|none|A Milne–Shaw seismograph in use at 'the Honolulu station' in Hawaii. (b) is the same instrument as shown in (a), but with the cover on. [https://prd-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Preserving%20Historic%20Earthquake%20Records-%206.gif USGS]]]
 [[File:Plinth.jpg|thumb|none|Bedrock connection plinth (current situation, BOAC, 2021)]]
 [[File:North.jpg|thumb|none|The plinth on which the tiltmeter was installed, is oriented on the North-South axis (2021)]]