Archive for the History Category

It’s all a question of angles.

Posted in History, mathematics on February 14, 2020 by telescoper

I couldn’t resist reblogging this fascinating post on the origins of trigonometry by the inestimable Thony Christie..

thonyc's avatarThe Renaissance Mathematicus

Thomas Paine (1736–1809) was an eighteenth-century political radical famous, or perhaps that should be infamous, for two political pamphlets, Common Sense (1776) and Rights of Man (1791) (he also wrote many others) and for being hounded out of England for his political views and taking part in both the French and American Revolutions.

Portrait_of_Thomas_Paine Thomas Paine portrait of Laurent Dabos c. 1792 Source: Wikimedia Commons

So I was more than somewhat surprised when Michael Brooks, author of the excellent The Quantum Astrologer’s Handbook, posted the following excerpt from Paine’s The Age of Reason, praising trigonometry as the soul of science:

EO_QsU2WkAIDGol

My first reaction to this beautiful quote was that he could be describing this blog, as the activities he names, astronomy, navigation, geometry, land surveying make up the core of the writings on here. This is not surprising as Ivor Grattan-Guinness in his single volume survey of the history…

View original post 1,567 more words

The Journal of Military History and Defence Studies

Posted in History, Maynooth, Open Access with tags , , , on February 13, 2020 by telescoper

I’ve been a bit busy with Computational Physics lectures and labs today so I couldn’t make it to the launch event of a new online Open Access Journal by Maynooth Academic Publishing, who also publish the Open Journal of Astrophysics. The new publication is the Journal of Military History and Defence Studies and its website is here.

Here is the description of the journal:

The Journal of Military History and Defence Studies is a bi-annual peer-reviewed open access online journal that publishers original research and contributions in military history and defence studies. In addition to publishing work by established authors and scholars, the journal has the particular aim of making available to a wide audience the best work completed by postgraduate students studying within these fields at Maynooth University, the Irish Military College and other similar institutions. The journal also aims to publish special editions that make available original research presented at conferences, research seminars etc. As the title suggests, the journal focuses on military history and defence studies, taking a broad view of these subject areas to include the history of war and of militaries, and also of the impact of these on wider society, in addition to the study of war, strategy, security and military organisation today and into the future.

You will see from the website that, as well as catering for a different discipline, this one has a look and feel that is quite different from that of the Open Journal of Astrophysics , but the ultimate aim of both journals is the same, to make high quality research available free of charge to the largest possible audience.

A Day of Results

Posted in History, Politics with tags , , , on February 10, 2020 by telescoper

The results of Saturday’s election are not all in yet, but it is clear that Sinn Féin have come top of the popular vote, with 24.5% of first preferences. As I write this they have 36 TDs compared to 22 altogether in the last Dáil Éireann. They are unlikely to win more than 2-3 more so won’t be the biggest party in terms of seats, but the chances are they will be part of the next Government.

In my own constituency of Kildare North, Sinn Féin’s Réada Cronin won a seat, dislodging one of the Fianna Fáil incumbents, Frank O’Rourke:

As news came in yesterday evening of the strong showing by Sinn Féin, quite a few old friends from the UK emailed me to ask about my opinion. Some for some reason were under the impression that this result is something to do with Brexit. It simply isn’t. The campaign was totally dominated by domestic issues, especially housing and health, on both of which the existing coalition has clearly failed. The so-called `Irexit’ party (funded and promoted by Nigel Farage stooges) flopped in spectacular, as did sundry other far-right parties who tried to whip up anti-immigrant sentiment.

Others asked whether the success of Sinn Féin makes a United Ireland more likely in the short term. Although I would love to see that outcome achieved by democratic means, I’m not sure that this election result automatically brings it closer. For one thing, the Border Poll that would be needed to achieve unification is not in the gift of the Dublin Government, whatever its complexion. For another. a successful vote for Irish unity would require a majority in favour on both sides of the border. The hard-line unionists in the North would not vote `yes’ under any circumstances so a majority would require a significant number of more moderate or more pragmatic unionists to swing towards unity. That may well happen as the negative effects of Brexit begin to bite on Northern Ireland, but it’s also possible that Sinn Féin’s past association with violence may scare some of them off. We’ll have to wait and see. A lot will depend on what happens in the next few months.

There are also some here in the Republic who regard Sinn Féin as pretty toxic, but I see the fact that it is now a major mainstream political party as a very positive development for Ireland’s democracy. For one thing, they offer a radical alternative to the two `establishment’ centre-right parties that have run Ireland for decades. These parties, Fine Gael and Fianna Fáil, came into existence as a result of the Irish Civil War, the latter party splitting from Sinn Féin on the issue of abstentionism. After the Civil War it was not until 1997 that the first Sinn Fein TD actually took a seat in the Dáil. Way back in 1919, however, the First Dail was essentially created by Sinn Féin. It seems to me only right that this party that played such a key role in Irish history should return from the wilderness. In some sense this General Election could mark the end of the beginning of Ireland as an independent nation.

Update: here is a summary of the final results.

The Reverend Professor Callan

Posted in Biographical, History, Maynooth, The Universe and Stuff with tags , , , , , on February 5, 2020 by telescoper

I’ve had a busy day doing various things that took me to various places on the Maynooth University campus, culminating in my first visit to the Department of Mathematics and Statistics (which is based in Logic House) to give a colloquium. On my travels I passed this sign, which I hadn’t noticed before:

Since I’ve been too busy to write a post today I thought I’d rehash an old one about the person named in the plaque, which is above Callan Hall (on the South Campus)

Father Nicholas Callan (or, more formally, The Reverend Professor Nicholas Joseph Callan) was born in County Louth in 1799 went to the seminary of St Patrick’s College, Maynooth, in 1816 to train as a priest. During his time as a seminarian Callan studied ‘Natural Philosophy’ and became interested in experiments involving electricity. In 1823 Callan was ordained as a priest, and went to Rome in 1826 to obtain his doctorate in Divinity. At the time Italy was a centre for research into electricity and here Callan became familiar with the work of the Italian physicist Alessandro Volta who had developed the world’s first battery. Callan returned to Maynooth where he was made chair of Natural Philosophy, a post he would hold until his death in 1864.

Callan is most famous for inventing the induction coil (in 1836). By connecting two copper wire coils to a battery and electromagnet and then interrupting the current he was able to generate much larger voltages than could be obtained from batteries alone. His 1837 version that used a clock mechanism to interrupt the current 20 times a second is estimated to have produced 60,000 volts – the largest artificially generated charge at that time. It is said that his induction coil could produce sparks 15″ long, which must have been fun to watch.

Callan’s biggest induction coil, unfinished at the time of his death, can be found in the National Science Museum of Ireland (which is in Maynooth). This was one of the largest in the world at the time. The iron core is 109 cm long. The secondary windings are 53 cm in diameter and consist of about 50 km of iron wire insulated with beeswax. They were made in three separate rings separated by air gaps, so wires carrying large voltage differences would not lie adjacent to each other, reducing the risk of the insulation breaking down. At the left end is a vibrating mercury ‘contact breaker’ in the primary circuit, actuated by the magnetic field in the primary, which interrupted the primary current to generate potentials of over 200,000 volts.

Sadly Callan’s work was forgotten for quite a period after his death – experimental electromagnetism was not a priority for St Patrick’s College at this time – for which reason the invention of the induction coil has often been attributed to Heinrich Ruhmkorff who made his first device (independently) about 15 years after Callan. More recently, however, Callan’s achievements have been more widely recognized and in 2000 the Irish government issued a stamp in his honour.

The Callan Building

Nicholas Callan was laid to rest in the College Cemetery at Maynooth in 1864. The Callan Building (above) on the North Campus of the present-day Maynooth University is named in his honour, as of course is Callan Hall which I mentioned at the start.

200 Years of the RAS Club

Posted in History, The Universe and Stuff with tags , , on January 11, 2020 by telescoper

Here I am in Heathrow Terminal 2 waiting for flight back to Dublin. I managed to get to London from Birmingham in time for a special dinner to mark the 200th anniversary of the RAS Club. As I have mentioned in previous posts, according to the brief history published on the RAS website:

The ‘Astronomical Society of London’ was conceived on 12 January 1820 when 14 gentlemen sat down to dinner at the Freemason’s Tavern, in Lincoln’s Inn Fields, London. After an unusually short gestation the new Society was born on 10 March 1820 with the first meeting of the Council and the Society as a whole. An early setback, when Sir Joseph Banks induced the Duke of Somerset to withdraw his agreement to be the first President, was overcome when Sir William Herschel agreed to be the titular first President, though he never actually took the Chair at a meeting.

Since the RAS Club always dines on the second Friday of the month after Ordinary Meetings of the Royal Astronomical Society itself, January 10th was the closest date to that first dinner. As expected for such a special occasion, there was a very big turnout with more than double the usual number of diners (and many more guests than usual). It was very nice to see some people I haven’t seen for ages! The food and wine were excellent and we ended with champagne and a slice of a cake baked and decorated for the occasion. Unfortunately it was so crowded in the Gallery Room that I couldn’t get close enough to take a photo of it before it was whisked away to be cut into slices.

After dinner we had some speeches, including one really brilliant one by my former colleague from Cardiff days, Mike Edmunds who had researched the `14 gentlemen’ who attended that first dinner. I had known previously that Charles Babbage and John Herschel were there but here (thanks to Mike) is a complete list:

Charles Babbage, Esq. M.A. F.R.S. L. & E. No. 5 Devonshire Street Portland Place
Arthur Baily, Esq, Gray’s Inn
Francis Baily, Esq. F.R.S. & L.S. Gray’s Inn
Major Thomas Colby, of the Royal Engineers, LL.D. F.R.S. L. & E. Tower
Henry T. Colebrooke, Esq. F.R.S. & L.S. Albany, Piccadilly
Olinthus G. Gregory, LL.D. Professor of Mathematics Royal Military Academy, Woolwich
Stephen Groombridge, Esq. F.R.S. S.R.A.Nap. Blackheath
J.F.W. Herschel, LL.D. F.R.S. Slough
Patrick Kelly, LL.D. Finsbury Square
Daniel Moore, Esq. F.R.S. S.A. & L.S. Lincoln’s Inn
Rev. William Pearson, LL.D. F.R.S. East Sheen, Surrey
James South, Esq. F.R.S. and L.S. No. 11 Blackman Street Southwark
Charles Stokes, Esq. F.R.S. S.A. & L.S. Gray’s Inn
Peter Slawinski D.P. Proff. University Wilna

P.S. Because I was attending the LGBTQ+ STEMinar I couldn’t get to the ordinary meeting of the Royal Astronomical Society earlier in the day, which was a shame because it was there that the winners of this year’s awards were announced. You can find a full list here. Congratulations to all!

Classics in the Russell Library

Posted in History, Literature, Maynooth, Uncategorized with tags on January 9, 2020 by telescoper

Here’s a taster of the wonderful collection of books and manuscripts in the Russell Library at Maynooth University..

Special Collections's avatarMU Library Treasures

Ruth O’Hara, Collections and Content

Ruth pic 1

Study of the classical world has been a staple of this University for centuries. The Russell Library’s classic’s collection, which was amassed largely by the early professors of St. Patrick’s College, is eclectic covering all areas of the ancient world and indeed it transcends disciplines. So, besides Homer and Virgil, for example, sit the poems of Catullus, the theological tracts of Ambrose of Milan, and the philosophical musings of Aristotle. One blog can’t hope to capture the extent and range of such a collection so, instead, I just want to look at some of the ways that we in the Russell Library continue to foster interest in this diverse subject area by integrating it into the research, teaching and life of the University.

We have found our classics collection to be a really useful resource for postgraduate students, for example, who engage with primary source…

View original post 426 more words

Change in Northern Ireland

Posted in History, Politics with tags , , on December 17, 2019 by telescoper

One of the potentially most significant outcomes of the 2019 General Election, but one barely mentioned in the English media, was what happened in Northern Ireland. For the first time ever, a majority of the MPs elected in the six counties were nationalist. The Social Democratic and Labour Party (SDLP) gained two seats to add to the seven of Sinn Féin (including a significant gain in Belfast North) while the Democratic Unionist Party (DUP) lost two to finish with eight. The remaining seat went to the Alliance, originally a moderate unionist party but now basically a liberal centrist (and anti-Brexit) party.

Here’s how the electoral map of Northern Ireland changed:

Sinn Féin seats are dark green, DUP orange, SDLP light green and Alliance yellow.

In terms of the popular vote, the DUP+UUP got 42.3% whereas SDLP+ Sinn Féin got 37.7. Both SF and DUP lost vote share compared to 2017 (by 6.7% and 5.4% respectively) at the expense of the Alliance (up 8.8%) and SDLP (up 3.1%).

Incremental differences, perhaps, but significant nonetheless – especially as Brexit hasn’t yet happened. After Brexit there will be a border in the Irish Sea, which will bring the end of partition one step closer. The probability of seeing a United Ireland in my lifetime has definitely increased.

It was no surprise to see the hashtag `#UnityPlan’ trending on Twitter immediately after the election. Irish unification will only happen if there is a public vote and a majority on both sides of the border agree. For that vote to be fair it is vital that there is a definite plan on how to proceed in the event that the vote is in favour, so the public know what they are voting for. The Irish should not make the mistake that Britain did over Brexit.

For many unionists religion was the primary reason for wanting to remain in the United Kingdom at the time of partition in 1921: Protestants felt that their identity would be threatened if they were made to join the Catholic South. Maybe they were right to feel nervous, as the original constitution of the Irish Free State enshrined “the special position of the Holy Catholic Apostolic and Roman Church”.  But the section including that phrase was deltd from the Constitution way back in 1973 and the Roman Church has far less influence in the Republic than it did. Ireland is now an open and progressive country, so I hope those fears have receded.

Just to confuse matters even further I should mention that my Grandfather, the one born in Belfast, to whom I owe my Irish citizenship,  was a protestant republican…

Those in the North who wish to keep their British passports should be able to do so in a United Ireland, just as those of us who were born in Britain but now live in Ireland can keep ours. I’ll be keeping mine, at least until it expires…

P.S. It is worth mentioning (primarily for British friends) that there are three counties in Ireland that belong to the province of Ulster but are not part of Northern Ireland as it was formed after partition: these are Monaghan, Cavan and Donegal. The northernmost point of Donegal, Malin Head, is actually the northernmost point on the island of Ireland.

Those `Former Mining Communities’

Posted in Biographical, History, Politics with tags , , , , , , , on December 15, 2019 by telescoper

I’ve generally avoided the UK media over the last few days but couldn’t resist commenting on a phrase that has appeared again in the context of constituencies in the North and Midlands of England that voted in Tory Members of Parliament in the 2019 General Election.

The first of these to declare a result was Blyth Valley, in Northumberland, a place that I know reasonably well as I grew up in the North-East. This constituency was created in 1955 and had a Labour MP continuously from then until December 12th 2019.

(Incidentally, the winning candidate in Blyth Valley, Ian Levy, presented himself as an NHS nurse, which he has never been. I doubt anyone cares, though. Bare-faced lying seems to be completely acceptable these days.)

(Left) Bates Colliery in Blyth in 1986 when it closed; (Right) the scene in 2014. Picture Credit Newcastle Evening Chronicle.

I should state for the record that I was born in Walker, to the East of Newcastle upon Tyne, but grew up in Benwell, to the West. When I was a child all the pits in the immediate vicinity, such as the Montague Main Colliery in Denton Burn, had already closed because the inland coal seams had been exhausted. Those remaining open were deep mines in which the coal faces were out under the North Sea.

Anyway, Blyth Valley was described in the media after the election result as a `Former Mining Community’. The town of Blyth is a port and was at one time a major centre for shipbuilding as well as coal mining, but the coal industry –especially Bates colliery – was indeed an extremely important factor in the town’s economy.

But Bates Colliery closed in 1986. A bit further inland the larger, and probably more famous, Ashington Colliery closed in 1988. The last mine in the North West Durham coalfield closed in 1994. Further South, Bolsover Colliery (in the Derbyshire constituency by Dennis Skinner for 49 years, until December 12th 2019) closed in 1993. And so on. All these places, and many others. decided to return Conservative MPs in 2019.

None of these places has had a working coal pit for 25 years or more, yet they are still consistently described in the media as `former mining communities’. I find that very telling, when there hasn’t been any mining there for a generation.

Coal mining forged the identity of these places. Almost everything revolved around the pits. Many of the houses were specifically by colliery owners to house the miners and their families. In the North-East, miners even had their own dialect, Pitmatic (distinct from Geordie). It wasn’t by any means an easy life being a miner but to be a miner at least meant having a distinct and proud identity,

The foundations of these communities were taken away during the Thatcher years. It’s not just about the local economic devastation, though that was bad enough, it was that the entire raison d’être disappeared. Over the subsequent decades little effort has been made by any Government of any complexion to stimulate the towns and villages so they remain `former mining communities’. Their past is well-defined, their future not.

After a decade of particularly severe austerity it’s hardly surprising that people in such areas expressed their anger at a political system that has failed them so badly, first in the 2016 referendum and then in this year’s General Election.

What’s less comprehensible (at least to me) is why anyone would think that their situation is likely to improve under the same Tories that have ignored them so consistently for so long. All I can guess is that it’s something to do with finding a sense of identity in a mining community that’s no longer a mining community. I suppose that, for some, this entails adopting increasingly nationalistic attitudes, such as were encouraged by the Conservative Party’s consistently xenophobic and anti-immigrant rhetoric.

For myself I don’t see what identity has to do with nationality at all. We can identify ourselves in all kinds of ways without having to rely on the geographical accident of our birthplace.

I have no idea what the next five years will bring for places like Blyth Valley and Bolsover. But the wider question is whether by the time of the next General Election we will will be talking about the former United Kingdom.

The Eddington Eclipse Expeditions and Astronomy Ireland

Posted in History, Talks and Reviews, The Universe and Stuff with tags , , , , , , on December 10, 2019 by telescoper

After a full shift during the day at Maynooth University, yesterday evening I made my way into Dublin to give a talk to a very large audience in the famous Schrödinger Lecture Theatre in Trinity College, Dublin, an event organized by Astronomy Ireland. I have given a number of talks on the topic of the 1919 Eclipse Expeditions during this centenary year, but I think this one had the biggest audience! We adjourned to a local pub for a drink afterwards before I dashed off to get the last train back to Maynooth.

Here are the slides I used during the talk:

This time there was an important addition to my usual talk, courtesy of Professor Peter Gallagher of DIAS. He brought along the actual 4″ object glass used in the expedition to Sobral (Brazil) in 1919. I have previously only shown a picture of it. The appearance of the actual lens drew a spontaneous round of applause from the audience, and I have to admit it was a remarkable feeling to hold a little piece of history in my hand!

Obviously I was careful not to drop this item. It is on permanent display in Dunsink Observatory, by the way, if you want to see it yourself. I hope it made its way back here safely!

After the talk was over I was chatting to a couple of members of the audience when Peter Gallagher took this nice picture actually through the lens:

Picture Credit: Peter Gallagher

I look rather old in this picture. Obviously a trick of the lens.

How Ireland Made Einstein Famous

Posted in History, Talks and Reviews, The Universe and Stuff with tags , on December 6, 2019 by telescoper

Before I depart for the weekend I thought I’d mention that I’m giving a talk on Monday evening (9th December) at 8pm in the Physics Building at Trinity College Dublin. The talk is followed by a reception in the Lombard Inn. Part of the advert is shown above but you can read more details at the Astronomy Ireland website.

If you’re around in Dublin on Monday then maybe I’ll see you there!