=River Water.=--The water supply of the city of Fargo, N. D., is taken from the Red River of the North, which after being filtered through a mechanical filtration plant is supplied to the water system of the city. The river water in its raw state is considered unfit for drinking because of the amount of organic matter present at different times of the year. Analysis of raw water from intake pipe, April 14, 1913: Parts per million Chlorine 10 Equivalent as sodium chloride, salt 16 Volatile and organic matter 80 Mineral solids 180 ---- Total solids 260 In this water neither the solids nor the organic matter are at all high but during a part of each year there are many pathogenic germs present, the contained typhoid bacillus being the most feared. The following is an analysis after the water has been filtered, April 14, 1913: Parts per million Chlorine 12 Equivalent as sodium chloride, salt 18 Volatile and organic matter 45 Mineral solids 140 ---- Total solids 185 It will be noticed that in the process of filtration there has been removed from the water 35 parts to the million of organic matter and with probably 99 per cent. of the pathogenic bacteria. In addition there has been removed 40 parts to the million of mineral solids, the removal of which has changed a _very hard_ water to that which is reasonably soft. The process of filtration has changed water that is generally condemned for drinking to one that is considered remarkably good. =Artesian Water.=--The analysis of the sample of artesian water given below is an example of the water analysis made by the North Dakota Pure Food Laboratory. It furnishes an illustration of the type of reports that are returned from samples of water submitted for examination. This report was in the form of a letter which was taken at random from the files of the laboratory. Sample of artesian water No. 1936 from Moorhead, Minn.: Parts per million Chlorine 70 Equivalent as sodium chloride, salt 116 Volatile and organic matter 90 Mineral solids 455 ---- Total solids 545