Vertical Pendulum Tilt Meter

2022-04-16T16:10:59Z

FS:

"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>

Reading and changing the seismographic records was part of the daily routine in Bidston Observatory.<ref>Joyce Scoffield, ''Bidston Observatory, The Place and the People''. p172</ref>

"In '''1900''' Bidston obtained its own Milne-Seismograph. and tables of its observations were published from '''1901'''." <ref>Joyce Scoffield, ''Bidston Observatory, The Place and the People''. p149</ref>

"The Dock Board felt that 'meteorological observations could be taken with equal accuracy elsewhere' and the Dock Board's 'interest in the unfelt tremors of the earth was not immediate'."<ref>Joyce Scoffield, ''Bidston Observatory, The Place and the People''. p150</ref>

[[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 using instruments designed by Sir George Darwin, Sir Horace Darwin and others 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 Prof J. A. Ewing’s Seismograph 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 Claustral Pendulum, Bidston acquired a Graf-Askania vertical pendulum of its own, and installed it after modification." <ref>Joyce Scoffield, ''Bidston Observatory, The Place and the People''. p328</ref>

Claustral Pendulum = encased pendulum? A 'Graf-Askania vertical pendulum' or 'gravimeter' or 'Askania vertical pendulum tiltmeter' measures tilt through changes in gravity (which is linked to measuring tidal load but I do not understand yet how).

"New tidal tilt observations were made in the Bidston cellar in the '''1930s'''. Doodson and Corkan ('''1934''') used a Milne-Shaw seismometer for one month of observations. In '''1934''', funds were used from a Cambridge mathematics prize that was awarded to Proudman to purchase a new Milne-Shaw seismometer. Beginning in March '''1935''', one year of observations of the north-south tilt were made using this instrument (Corkan, 1939)."<ref name="baker"></ref>

"Geoff Lennon made further observations of the north-south tilt at Bidston using the Milne-Shaw seismometer between '''1952''' and '''1954'''. For the International Geophysical Year 1957-1958 there were increased efforts to make observations of Earth tides around the world."<ref name="baker"></ref>

"In the Bidston cellar, modified Milne-Shaw seismometers were used to measure the tilts in both the north-south and east-west directions from July '''1957''' to December '''1958''' (Lennon, 1959)."<ref name="baker"></ref>

"The Bidston cellar provided a useful test site for comparing various tiltmeters, before installation in the tunnel at Llanrwst."<ref name="baker"></ref>

[[File:Glasses.jpg|thumb|none|Photograph of a scientist with tiltmeter in situ, installed in the cellar of BOAC (2021)]]
[[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)]]

''The Milne-Shaw Tilt Meter (or maybe there was more than one?) was transferred to the University of Aberdeen in '''1997'''''.

"The NSA (National Seismographic Archive) holds the ex-Bidston Milne-Shaws, 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]]
[[category: Stories]]

2022-04-16T12:09:46Z

FS:

[[Mediawiki help]]

[[Accountability]]

[[To_Do_list]]

== Invitations for contributing to this wiki ~ add your own ==

The wiki does not look to homogenise voices or smooth transitions. It aims to be humble, transparent and expansive. It is meant to be re-read, written, re-written through multiple voices and from different perspectives.

For the moment we propose to re-narrate The Bidston Observatory from two directions. On the one hand, through formulating a list of questions with possible answers that seem in need of collective thinking. On the other hand by experimenting with describing historical and imaginary (non)objects that are linked to the Bidston Observatory. This also includes a reflection on what objects are present in this wiki and will find their place in the HECS.

=== Care of this wiki ===

The wiki needs to be cared for collectively. Damage will happen over time, please do offer repairs if you notice wear or signs of use in the writing.

==== How-to's ====

https://tableconvert.com/csv-to-mediawiki

Inventories

2022-04-16T12:07:10Z

FS: /* Archives related to the one o'clock Gun */

== In house Bidston Observatory Archive ==

Physical objects kept in the Bidston Observatory archive. Last updated 14/04/2022.

{| class="wikitable sortable"
! Box !! Packet/folder No. !! Item No. !! Item !! Description !! Provenance !! Date Added !! External Archive Numbering !! Digitization(s) !! Comments
|-
| A || 1 || || Bidston Anemometer pressure tube recordings 1905 || Full year original charts from instrument || via Peter Vincent - neighbour (f) worked @ the obs || 11/01/17 || || ||
|-
| || 2 || || Bidston thermographic records 1906 || Full year original charts from instrument || via Peter Vincent - neighbour (f) worked @ the obs || 11/01/17 || || ||
|-
| || 3 || 3.1 || Annual report 1969-70 || Institute of coastal oceanography and tides || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.2 || Annual report 1969-70 || Second copy - Institute of coastal oceanography and tides || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.3 || Annual report 1971-72 || Institute of coastal oceanography and tides || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.4 || Annual report 1972-73 || Institute of coastal oceanography and tides || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.5 || Annual report 1973-74 || NERC Institute for Oceanographic Sciences || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.6 || Annual report 1975 || NERC Institute for Oceanographic Sciences || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.7 || Annual report 1976 || NERC Institute for Oceanographic Sciences || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.8 || Annual report 1977 || NERC Institute for Oceanographic Sciences || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.9 || Annual report 1978 || NERC Institute for Oceanographic Sciences || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.10 || Annual report 1979 || NERC Institute for Oceanographic Sciences || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.11 || Annual report 1980 || NERC Institute for Oceanographic Sciences || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.12 || Annual report 1981 || NERC Institute for Oceanographic Sciences || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.13 || Annual report 1982 || NERC Institute for Oceanographic Sciences || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.14 || Annual report 1983 || NERC Institute for Oceanographic Sciences || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.15 || Annual report 1984 || NERC Institute for Oceanographic Sciences || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.16 || Annual report 1985/86 || NERC Institute for Oceanographic Sciences || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.17 || Annual report 1987/88 || NERC Proudman Oceanographic Laboratory || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.18 || Annual report 1988/89 || NERC Proudman Oceanographic Laboratory || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.19 || Annual report 1989/90 || NERC Proudman Oceanographic Laboratory || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.20 || Annual report 1990/91 || NERC Proudman Oceanographic Laboratory || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.21 || Annual report 1991/92 || NERC Proudman Oceanographic Laboratory || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.22 || Annual report 1992/93 || NERC Proudman Oceanographic Laboratory || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.23 || Annual report 1993/94 || NERC Proudman Oceanographic Laboratory || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.24 || Annual report 1994/95 || NERC Proudman Oceanographic Laboratory || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.25 || Annual report 1995/96 || NERC Proudman Oceanographic Laboratory || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.26 || Annual report 1996/97 || NERC Proudman Oceanographic Laboratory || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.27 || Annual report 1997/98 || NERC Proudman Oceanographic Laboratory || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.28 || Annual report 1997/98 || Second copy - NERC Proudman Oceanographic Laboratory || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.29 || Annual report 2002/03 || NERC Proudman Oceanographic Laboratory || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.30 || Annual report 2003/04 || NERC Proudman Oceanographic Laboratory || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.31 || Annual report 2006/07 || NERC Proudman Oceanographic Laboratory || Valerie Doodson || 02/01/18 || || ||
|-
| || || 3.32 || "Annual reports bound, 1940-45 & 1951 to 1958" || Liverpool observatory and tidal institute || Valerie Doodson || 02/01/18 || || ||
|-
| || 4 || || "Annual reports loose, 1940-45 & 1951 to 1956" || Liverpool observatory and tidal institute || Valerie Doodson || 02/01/18 || || ||
|-
| || || || "Tables high & low water, Jan - Dec 1961" || Southend / Tilbury / R.Albert Dock / London Bridge || Valerie Doodson || 02/01/18 || || ||
|-
| || || 5.1 || Photocopied image orig. from plate XX - Lighthouse and signals on Bidston Hill 1826 || Cardboard back || Valerie Doodson || 02/01/18 || || ||
|-
| B || 5 || || Assortment NERC magazines / info flyers || || Valerie Doodson || 02/01/18 || || ||
|-
| || 6 || 6.1 || Newspaper clippings related to Bidston Observatory || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 6.2 || "Corespondance, incl. job application letters & reply to enquiry about Doodson-Lege" || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 6.3 || Infographics on instruments / lighthouse etc. Speeches on the OBS. || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 6.4 || The polemic obs newspaper ed. Judith Woolf || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 6.5 || Notes technical writing workshop || || Valerie Doodson || 02/01/18 || || ||
|-
| || 7 || || > Box file of photos || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 7.1 || foamboard backed reproduced photos || Some foamboard backed || Valerie Doodson || 02/01/18 || || ||
|-
| || || 7.2 || original photos || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 7.4 || roll prints || || || || || ||
|-
| || || 7.3 || Negs / slides || || Valerie Doodson || 02/01/18 || || ||
|-
| || 8 || 8.1 || Thames barrage information || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 8.2 || Copyright fees || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 8.3 || Charges for tidal predictions || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 8.4 || "copies of operating procedures, how to calculate for tidal prediction & timing/costs" || || Valerie Doodson || 02/01/18 || || ||
|-
| C || 9 || || Mersey Docks and Harbour Board 1878 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1879 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1880 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1882 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1883 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1884 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1885 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1886 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1887 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1888 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1890 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1891 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1893 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1894 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1895 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1896 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1897 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1898 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1899 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1900 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1901 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1902 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1903 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1904 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1906 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1907 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1908 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1909 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board Tide Tables 1953 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board Tide Tables 1954 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board Tide Tables 1965 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board Tide Tables 1966 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board Tide Tables 1967 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board Tide Tables 1968 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || "Mersey Docks and Harbour Board Tide Tables 1969, with engineers supplement" || || Valerie Doodson || 02/01/18 || || ||
|-
| || 11 || || Mersey Docks and Harbour Board 1910 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1911 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1912 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1913 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1914 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1915 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1916 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1917 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1919 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1920 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1921 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1922 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1924 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1925 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1927 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1928 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1929 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1930 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1931 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1932 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1933 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1934 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1936 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1937 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1938 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1939 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1940 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1941 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1964 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1965 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1968 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board 1969 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Holdens Almanac 1880 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Holdens Almanac 1882 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Holdens Almanac 1883 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Holdens Almanac 1885 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Holdens Almanac 1885 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Holdens Almanac 1886 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Holdens Almanac 1888 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Holdens Almanac 1889 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Holdens Almanac 1889 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Holdens Almanac 1890 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Holdens Almanac 1891 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Holdens Almanac 1892 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Holdens Almanac 1893 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Holdens Almanac 1894 || || Valerie Doodson || 02/01/18 || || ||
|-
| || 12 || || Mersey Docks and Harbour Board Liverpool Tide Tables 1975 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board Liverpool Tide Tables 1979 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board Liverpool Tide Tables 1984 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Mersey Docks and Harbour Board Liverpool Tide Tables 1985 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Port of London Authority Handbook Tide Tables & Port Information 1988 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || National Rivers Authority Tide Tables 1990 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Associated British Ports Southampton Tide Tables 1993 || || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Fred's Tide Guide 1987 || || Valerie Doodson || 02/01/18 || || ||
|-
| || 13 || 13.1 || Plate - Details of gears for driving component || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 13.2 || Plate - portable tidal machine || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 13.3 || Plate - Doodson-Lege || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 13.4 || Plate - village scene (Bidston?) || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 13.5 || Plate - Bidston hill windmill || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 13.6 || Plate - flagstaffs || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 13.7 || "Plate - Doodson-Lege, component " || Marked 'J' || Valerie Doodson || 02/01/18 || || ||
|-
| || || 13.8 || "Plate - Doodson-Lege, component " || Marked 'M' || Valerie Doodson || 02/01/18 || || ||
|-
| || 14 || || "Photocopied documents - texts, scientific papers from the observatory library" || || Valerie Doodson || 02/01/18 || || ||
|-
| || 15 || || "Study of changes inhigh water levels & tides, LPL" || "Liverpool, last 230 yrs, Phil Woodworth POL rpt 56" || Valerie Doodson || 02/01/18 || || ||
|-
| || || || Market & business strategy for tidal computations & stats || "Anne Auslid Tryggeset, Bath Uni MBA 1990" || Valerie Doodson || 02/01/18 || || ||
|-
| || || || POLTIPS tidal prediction software info || || Valerie Doodson || 02/01/18 || || ||
|-
| D || 16 || 16.1 || "Original tidal prediction cards, harmonic analyses, visualisations" || || Valerie Doodson || 02/01/18 || || ||
|-
| || || 16.2 || Print outs of visualisations and data || || || || || ||
|-
| || 17 || || Collected correspondance 1940's - 1950's post war || || Valerie Doodson || 02/01/18 || || ||
|-
| || 18 || || Collected correspondance 1940's - 1950's post war || || Valerie Doodson || 02/01/18 || || ||
|}

== Archives related to the one o'clock gun ==

Physical objects relative to the one o'clock gun stored in the NML (?), digital snapshots are stored on a harddrive kept in the Bidston Archives.

{| class="wikitable sortable"
! Item No. !! !! Item !! Description !! Provenance !! Digitizations(s) !! Comments
|-
| 1.1 || 1.5 || Letters 1939-1946 about Time Gun || || "Phil Woodworth, now in NML" || ||
|-
| 2.2 || 2.3 || Early photos gun & Liverpool || Photocopies of photos || || ||
|-
| 3 || || Investigation August 1958 || "Notes, handwritten" || || ||
|-
| 3.2 || || Procedure for testing and firing gun || || || ||
|-
| 3.3 || 3.6 || Gun & Gauge circuits & Wiring || || || ||
|-
| 3.7 || 3.8 || Chadburn – Doodson Tide Recorder schematic || || || ||
|-
| 3.9 || || commutator resistance || || || ||
|-
| 3.1 || || Circuit for galvo box || || || ||
|-
| 3.11 || 3.27 || Sangmo Weston correspondance & invoices || || || ||
|-
| 3.28 || || Note Volts & Pulse || "Note, handwritten" || || ||
|-
| 3.29 || 3.3 || Uni of LPL dept. of Physics New posts description 1962 & pencil notes on the back || Typewritten document || || ||
|-
| 3.31 || 3.32 || Grant application 1961 || || || ||
|-
| 3.33 || || "Correspondence to Sangemo, Sheffield, 1962 RE: relays" || Letters || || ||
|-
| 3.34 || || "Correspondence from Sangemo, Sheffield, 1960 RE: relays" || Letters || || ||
|-
| 3.35 || || "Correspondence to observatory about relays, 1960" || Letters || || ||
|-
| 3.36 || || Newlyn / Shoreham Data set coastal to input to tidal prediction machine 1958 || Handwritten Table || || ||
|-
| || 3.37 || "Pencil diagram on back, resistance, 1960" || || || ||
|-
| 3.38 || || Liverpool / Glasgow Data set coastal to input to tidal prediction machine 1958 || || || ||
|-
| 3.39 || || || || || ||
|-
| 3.4 || 3.41 || Pen Diagram Jan 1960 with notes on back || || || ||
|-
| 3.42 || || Gun & Gauge circuits diagram on squared paper || || || ||
|-
| 3.43 || || Switchboard wiring || || || ||
|-
| 3.44 || || Circuit diagram 1959 || Handwritten in pen || || ||
|-
| 3.45 || || Investigation of Galvo currents || Handwritten in pen || || ||
|-
| 3.46 || || 'Commutator’ (?) Resistances || Handwritten in pen || || ||
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| 3.47 || || Circuit for Galvo box || Handwritten in pen || || ||
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| 3.48 || || Investigation August 1958 || || || ||
|}