seamus dubhghaill

Promoting Irish Culture and History from Little Rock, Arkansas, USA


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Birth of John Tyndall, Experimental Physicist

File source: //commons.wikimedia.org/wiki/File:John_Tyndall_(scientist).jpgJohn Tyndall, Irish experimental physicist who, during his long residence in England, is an avid promoter of science in the Victorian era, is born on August 2, 1820 in Leighlinbridge, County Carlow.

Tyndall is born into a poor Protestant Irish family. After a thorough basic education he works as a surveyor in Ireland and England from 1839 to 1847. When his ambitions turns from engineering to science, he spends his savings on gaining a Ph.D. from the University of Marburg in Marburg, Hesse, Germany (1848–1850), but then struggles to find employment.

In 1853 Tyndall is appointed Professor of Natural Philosophy at the Royal Institution, London. There he becomes a friend of the much-admired physicist and chemist Michael Faraday, entertains and instructs fashionable audiences with brilliant lecture demonstrations rivaling the biologist Thomas Henry Huxley in his popular reputation and pursuing his research.

An outstanding experimenter, particularly in atmospheric physics, Tyndall examines the transmission of both radiant heat and light through various gases and vapours. He discovers that water vapor and carbon dioxide absorb much more radiant heat than the gases of the atmosphere and argues the consequent importance of those gases in moderating Earth’s climate, that is, in the natural greenhouse effect. He also studies the diffusion of light by large molecules and dust, known as the Tyndall effect, and he performs experiments demonstrating that the sky’s blue color results from the scattering of the Sun’s rays by molecules in the atmosphere.

Tyndall is passionate and sensitive, quick to feel personal slights and to defend underdogs. Physically tough, he is a daring mountaineer. His greatest fame comes from his activities as an advocate and interpreter of science. In collaboration with his scientific friends in the small, private X Club, he urges greater recognition of both the intellectual authority and practical benefits of science.

Tyndall is accused of materialism and atheism after his presidential address at the 1874 meeting of the British Association for the Advancement of Science, when he claims that cosmological theory belongs to science rather than theology and that matter has the power within itself to produce life. In the ensuing notoriety over this “Belfast Address,” his allusions to the limitations of science and to mysteries beyond human understanding are overlooked. He engages in a number of other controversies such as spontaneous generation, the efficacy of prayer and Home Rule for Ireland.

In his last years Tyndall often takes chloral hydrate to treat his insomnia. When bedridden and ailing, he dies from an accidental overdose of this drug on December 4, 1893 at the age of 73 and was buried at Haslemere, Surrey, England.

Tyndall is commemorated by a memorial, the Tyndalldenkmal, erected at an elevation of 7,680 ft. on the mountain slopes above the village of Belalp, where he had his holiday home, and in sight of the Aletsch Glacier, which he had studied.


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Clare O’Leary Climbs Mount Everest

clare-o-learyClare O’Leary, Irish gastroenterologist, mountain climber and adventurer, becomes the first Irishwoman to successfully climb Mount Everest on May 18, 2004. She is accompanied by veteran mountaineer, Pat Falvey, who also sets a record by becoming the first Irishman to climb Everest from both sides.

O’Leary is born in 1972. She develops an interest in medicine, and cancer in particular, when her uncle dies from lung cancer during her childhood. After graduating from University College Cork, she spends over ten years training and working at the Cork University Hospital.

O’Leary makes her name in mountaineering in 2004, when she becomes the first Irish woman to reach the summit of Mount Everest, having failed on her first attempt in 2003 due to gastroenteritis. She climbs as a member of the Wyeth Irish Everest Expedition, led by Falvey. She also becomes the first Irish woman to ascend the Himalayan peak Ama Dablam and to climb the Seven Summits — the highest mountains on each continent. In 2008, she joins the Beyond Endurance expedition led by Falvey to the South Pole, making her the first woman to successfully ski to the South Pole.

In 2012, O’Leary and Mike O’Shea set out on an ongoing series of expeditions that they call the Ice Project. Their aim is to cross all of the world’s largest ice caps. Some of these expeditions include crossings of the Northern Patagonian Ice Field, the Greenland ice sheet, and Lake Baikal. In 2014, they attempt to ski to the North Pole after their first attempt in 2012 is cancelled due to a logistics problem, hoping to be the first Irish people to reach the North Pole. This attempt also has to be abandoned after they are injured in a sled accident.

In 2013, the railway path between Bandon and Innishannon in County Cork is named the Dr. Clare O’Leary Walk to commemorate her achievements. In November 2018, she is awarded an honorary doctorate by National University of Ireland Galway.

O’Leary lives in Clonmel, and is in a relationship with O’Shea. She currently works as a consultant gastroenterologist and general physician at South Tipperary General Hospital. She is also a patron of the Cork University Hospital Charity.