Moisture
Water is life, not only for humans, but also for other organisms. Water is necessary for the growth and multiplication of bacteria. Not only is water a major component of the bacterial cell cytoplasm. On an average, 75% to 80% of the bacterial cell is water when examined under a compound microscope, but it […]

Moisture Water is life, not only for humans, but also for other organisms. Water is necessary for the growth and multiplication of bacteria. Not only is water a major component of the bacterial cell cytoplasm. On an average, 75% to 80% of the bacterial cell is water when examined under a compound microscope, but it […]

It was the great bacteriologist Koch who first demonstrated that filtered water would prevent water-borne epidemics. In 1893 he was asked to determine why, when both Hamburg and Altona drank the waters of the river Elbe, the former had a cholera outbreak while the latter remained free from it. Koch was not content with pointing […]

Water is the great natural diluter. From three fifths to four fifths of the bodies of plant and animal life are made up of water. It is more necessary to life, especially higher life, than more nutritive material. Human beings can survive weeks without food but only days without water.

The first municipal filtering system in the United States was installed in Scheneetady, N. Y., in 1879. Some years later Lawrence, Mass., developed further the idea of a clean and healthful drinking water. These two cities used filters in which the main constituents were sand and gravel, and the process both mechanical and biological.