Eventually, the heart can’t maintain adequate blood pressure.Cholera’s first significant effect is serious dehydration and reduced blood circulation.Cholera is a species of bacterium ( Vibrio cholerae).Londoners felt that things could not continue at this pace for long-the metropolitan city, as a concept, was untested and unproven.The financial cost of waste removal was high thus, many let excrement accumulate, and there were heaps of feces the size of large houses all throughout London.Efficient waste recycling is crucial for dense concentrations of life to survive.This population density was unprecedented at the time, and the techniques for managing it didn’t exist yet: recycling centers, public health departments, and safe sewage removal.2.5 million people lived within London’s 30-mile circumference.He is a Distinguished Writer In Residence at NYU's School Of Journalism, and a Contributing Editor to Wired. His writing appeared in the Guardian, the New Yorker, Nation and Harper's, as well as the op-ed pages of The New York Times and the Wall Street Journal.

it is difficult to do justice to the exuberance of Johnson's ideas' Scotland on Sunday Steven Johnson is the author of the acclaimed books Everything Bad is Good for You, Mind Wide Open, Where Good Ideas Come From, Emergence and Interface Culture.

a vast, interconnected picture about urban and bacterial life. vivid and gripping' New Statesman 'Exhilarating' Spectator 'It is a rattling scientific mystery, but in the hands of Steven Johnson it becomes something much richer. 'A wonderful book' Mail on Sunday 'A thumping page-turner' Daily Telegraph 'Enthralling. In telling their extraordinary story, Steven Johnson also explores a whole world of ideas and connections, from urban terror to microbes, ecosystems to the Great Stink, cultural phenomena to street life. In The Ghost Map he tells the story of the terrifying cholera epidemic that engulfed London in 1854, and the two unlikely heroes - anesthetist Doctor John Snow and affable clergyman Reverend Henry Whitehead - who defeated the disease through a combination of local knowledge, scientific research and map-making. Steven Johnson is one of today's most exciting writers about popular culture, urban living and new technology. From the bestselling author of Everything Bad is Good For You, Steven Johnson's The Ghost Map vividly recreates Victorian London to show how huge populations live together, how cities can kill - and how they can save us.

Sparknotes ghost map