This October, 1951 photograph was provided by the Center for Disease Control's (CDC), National Institute for Occupational Safety and Health (NIOSH). The image depicted a 'Calkins Slurry Treater - Model 5-30', which was used to treat stored seed grain with methlymercury on an Oklahoma farm. During the 1950s and 1960s, mercury was used in agricultural settings as a fungicidal seed treatment in the form of methyl-mercury, and had been known to enter the human-inclusive food chain when farm-raised birds such as turkeys and phesants consumed mercury treated grains. The customery use of mercuric fungicides, has for the most part, been discontinued in the developed world, but may still be implemented in the underdeveloped world. This compound need not be ingested in order to impart its neurotoxic effects to humans, but may also be readily absorbed through the skin as well, with the nervous system being the site of its selective concentration.
CDC/ Barbara Jenkins, NIOSH
December 3, 2012
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