This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.
The U. S. Geological Survey has for some years past been investigating the water supplies of the country in their economic bearings, and at the beginning of the present season it has taken up their consideration in a hygienic point of view. The investigation aims to discover the changing conditions as affected by pollution of various kinds, drainage and sewage, manufacturing, etc. The turbidity, color, odor, amount of nitrogen, as free ammonia, albuminoid ammonia, nitrites and nitrates, the amount of chlorin, the total residue, the alkalinity, hardness, amount of carbon dioxid and the proportion of bacterial contents are to be noted. Under special conditions the amount of iron will be determined and special study of microörganisms be made. The cooperation of a large number of observers in different localities is being secured and directions issued to insure uniform observations. The methods used for chemical and bacteriologic examinations are those recommended
A GOVERNMENT INVESTIGATION OF WATER SUPPLIES.. JAMA. 1902;XXXIX(9):496. doi:10.1001/jama.1902.02480350034009
Customize your JAMA Network experience by selecting one or more topics from the list below.
Create a personal account or sign in to: