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Snow, in contrast to Farr's epidemiology, was far more innovative and spontaneous in his methods, which also made his conclusions, in the eyes of his colleagues more suspect. As well as doing his own hands-on research, Snow analyzed the "natural experiment created when one water- supply company of London, the Lambeth Company -- but not the Southwark and Vauxhall Company -- moved its water inlet to a less polluted area of the Thames. Snow's hypothesis was that if cholera was related to consumption of water contaminated by human excrements, then mortality rates should be greater among those who drank the contaminated water supplied by the Southwark and Vauxhall Company than among those who drank the cleaner water supplied by the Lambeth Company" (Morabia 2001: 224). Determining the exact purity of the water supply at a given point in time, however, was difficult, and made it difficult for Snow's thesis to eliminate other possibilities of causation (Eyler 2001: 227-288).
Thus from the point-of-view of his colleagues at the time, there was some 'sloppiness' to Snow's published methods and his unequivocal claims, in marked contrast to the cleaner, more balanced portrayal provided by Farr. "Snow did not know the number of people at risk of cholera in his test case…he did not even know the number of households supplied by each company in the districts with the mixed water supply" (Eyler 2001: 227). Because the experiment was based upon real-world data, Snow's experimental analysis was not perfectly controlled. There were distinct demographic differences thought to be relevant at the time between the populations using the different water supplies (Eyler 2001: 227). Snow also did not entertain a multifactoral possibility for the spread of disease. On the surface, Farr seemed more balanced and scientifically impartial: Snow was more passionate and less rigorous in his defense of his belief schema.
In defense of Snow's critics, one of the most common criticisms of many scientific experiments is the unwillingness on the part of the researchers to deal with contradictory data that does not support their original hypothesis. Farr's tentativeness made him seem more fair and scientific. Yet while Snow was criticized for subsuming too much evidence to suit his thesis, his critics could and should be equally criticized for subsuming their view of his research to suit their own ideas about how all disease were airborne.
Even if Snow may have been more dogmatic in his presentation, he was ultimately correct: "Snow was exclusive or reductionist in theory, and he focused his empirical investigation on finding collaborating evidence and ignored negative evidence or anomalous case," the kind that had distracted Farr (Eyler 2001: 230). For Snow, the purpose was to verify his thesis regarding a public health crisis, not merely the gentlemanly pursuit of discovery (Eyler 2001: 230). Eventually, after more reasoned consideration Farr began to change his mind and concede that waterborne transmission of the ailment was possible (Eyler 2001: 230). But without Snow's dogmatism, it is unlikely that such a view would have gained in popularity -- just as it is true that without Farr's statistics, Snow may not have come up with his thesis. The Snow vs. Farr debate suggests that the world needs both Farrs and Snows -- data-based researchers and as well as passionate, hands-on testers of theories. Both are needed to get to the bottom of disease causation, given the challenges that causality poses to scientific investigators of disease-related phenomena.
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Morabia a. (2001). Snow and Farr: A scientific duet. Soz Praventiv Medicine, 46 (4): 223-224.
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"Scientific Method John Snow William" (2010, August 30) Retrieved October 27, 2016, from http://www.paperdue.com/essay/scientific-method-john-snow-william-12266
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John Snow father epidemiology pioneering research analogy containment cholera outbreak London 1800's. However, contributor, William Farr, provided substantial information data understanding etiology spread cholera research surveillance John Snow is known as the founder of modern epidemiology. Summarize his works and findings, describing the premise on which his experiments were formulated. How did Snow explain that cholera's first symptoms were abdominal pains? How does his work demonstrate the scientific method? Snow first
On the part of his fellow scientists, Snow's research was resisted because it was conducted with intellectual 'leaps' of logic in his determination to find the cause, as opposed to Farr's more technical and methodological approach. Farr had the more comprehensive health surveillance program, but Snow's hypothesis and instincts were correct. Snow drew upon past studies involving smallpox, cowpox, and syphilis, to extrapolate parallel examples of how the disease
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The hope, of course, that to the extent possible, both groups will invest themselves, and their money, in the ways that Mr. Gore is going to suggest in the film. The Scientist and Mentors Finally, Mr. Gore shows an image of earth that was made by a friend of his - all of the experts in the film are friends of Mr. Gore. The image was, again, made over a period
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