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Lighting the Industrial Revolution
History & The Arts

Lighting the Industrial Revolution

...liquid. It is a simple experiment: just stick a rod of copper and one of iron in a lemon, and connect the two together in an external circuit, and you will generate electricity. By connecting such devices together in a "pile", large voltages can be generated at will. Sir Humphrey Davy quickly discovered in 1802 that by putting two carbon electrodes a short distance apart,...
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Article 5 mins
Roman cookery
History & The Arts

Roman cookery

...liquids, one at a time, blending well between each addition. Place the finished sauce into a sauce pan and heat until it simmers. Serve with a slice of pork, or wild boar if possible. Courtesy of Sally Grainger Further reading The Classical Cookbook Andrew Dalby and Sally Grainger, British Museum Press The Roman EmpireC Wells, Fontana History of the Ancient World The...
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Activity 10 mins
Is a technological solution always the best? The politics of toilets
Health, Sports & Psychology

Is a technological solution always the best? The politics of toilets

...solid waste. The decision to help fix this enormous problem is laudable but the Nano Membrane Toilet side-steps the real social and economic problems that keep people in unsanitary conditions. It might even create new, unintended sanitation problems. [An outside toilet, Bangladesh, 2010] An open-air toilet in Bangladesh, 2010 I’ll get this out of the way: the only...
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Article 5 mins
Methods in Motion: A view from a train
Health, Sports & Psychology

Methods in Motion: A view from a train

...solid ground it might feel like we are standing still, but in fact we are zooming through space in an orbit around the sun. Being in motion, from Galileo’s time onwards, became a matter of perspective and not something that is absolute. A key issue then becomes: how to broaden your perspective? From the perspective of a person standing on the earth, the earth feels...
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Article 5 mins
Ready or not, we're having an election
Society, Politics & Law

Ready or not, we're having an election

...solid Conservative majority will settle the question of whether she has the consent of the electorate to take Britain out of the single market – a position her opponents have dubbed “hard Brexit”. So, has May made the right call? UK election cycles are normally four to five years, but occasionally earlier elections are called. Harold Wilson called one in 1966, just...
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Article 5 mins
Why is New Delhi experiencing ever-worsening periods of smog?
Nature & Environment

Why is New Delhi experiencing ever-worsening periods of smog?

...solid waste generated daily by New Delhi’s 25 million residents. Alarm bells first began ringing in 2014 when a WHO study of ambient air pollution in 1,600 cities across the world found New Delhi the worst. This was especially in respect to respirable suspended particulate matter (RSPM) or PM 2.5 — which can enter the blood stream via the lungs. The WHO study...
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Article 5 mins
Thermal spraying (Hardfacing)
Science, Maths & Technology

Thermal spraying (Hardfacing)

...solid (wire, rod or cord) or powder, and are heated into the molten or semi-molten state by thermal, electrical or thermochemical means. The sprayed particles impinge on the substrate and flatten out into thin platelets...[Images to demonstrate 'Thermal spraying (Hardfacing)' - see article] Thermal processes Flame powder; flame wire; spray and fuse [Images to demonstrate...
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Article 10 mins
Derry Air: the new local history
Society, Politics & Law

Derry Air: the new local history

...solid stone walls, a thriving port for many years, resettled from London in the seventeenth century (a kind of colonisation – so I understand something of that too from the inside), used as a naval base during the battle of the Atlantic in the Second World War, plagued by the ‘troubles’ of internecine religions for the long post-war years, now relatively at peace....
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Article 10 mins