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"An acute infectious disease, due to the implantation of the comma bacillus of Koch, characterized by vomiting, purging, rice-water evacuations and suppression of urine." — Richardson, 1906

Cholera Germ

"An acute infectious disease, due to the implantation of the comma bacillus of Koch, characterized by…

"A filter to strain out the germs at the house tap. Such a filter must be cleaned and boiled weekly." —Davison, 1910

Tap water filter

"A filter to strain out the germs at the house tap. Such a filter must be cleaned and boiled weekly."…