A rare photo of the Clayton fumigating a house in 1914. The Clayton Disinfector was a fumigation device used to combat plague and other diseases spread by rats and insects in the early 20 th century. The device emitted sulfur-polyoxide gas, usually diluted to 10-12%. The Clayton worked by burning sulfur in the apparatus and blowing the gas through the fumigation tubes. The gas passed through a device that cooled the gas before entering the area being fumigated. The gas was left for about eight to twelve hours before being removed. One pound of sulfur could be used to fumigate 400 cubic feet. The gas was effective against bubonic plague spores, cholera, and typhoid. In small doses, the gas actually worked as a preservative for meat and was not harmful to other food items, with the exception of fruits and vegetables and any type of liquid. The Clayton Disinfectors were used to disinfect cargo ships to ensure that they did not transport diseases from port to port. The...