======================================================================= | | MATTER,| | PERMAN-| ALBUM- | FREE | Sample| TOTAL | ORGANIC| CHLOR- | GANATE | INOID |AMMONIA.| REMARKS. | SOLIDS.| & | INE. | TEST. |AMMONIA.| | | | VOLA- | | | | | | | TILE. | | | | | -----+--------+--------+--------+--------+--------+--------+----------- |_Gramme_|_Gramme_|_Gramme_| _Drops_|_Gramme_|_Gramme_| 1. | 0.81 | .09 | .11 | 30 |.0024 | ???? |Very bad. 2. | 1.061 | .179 | .06 | 24 |.00015 | .00009 |Suspicious. 3. | 1.26 | .29 | .115 | 38 | ???? | ???? |Very bad. 4. | 0.94 | .131 | .093 | 22 | ???? | ???? |Bad. 5. | 0.89 | .055 | .032 | 11 |.00009 | .00001 |Suspicious. 6. | 0.964 | .098 | .08 | 15 |.00011 | .00001 |Suspicious. 7. | 0.798 | .178 | .104 | 28 |.00089 | .00005 |Very bad. 8. | 0.37 | .025 | .049 | 12 |.0003 | .0004 |Suspicious. ======================================================================= NOTE: ???? means not obtained. In regard to the wholesomeness or unwholesomeness of water, Watt’s Dictionary of Chemistry gives the following: “Water suitable for economical, technical or culinary purposes should not contain of solid constituents to exceed five-tenths of a gramme to one gramme per litre. Water containing one-tenth gramme per litre of organic matter is unfit for culinary purposes or drinking. Wholesome water should not contain of organic matter more than five-one thousanth to one one-hundredth gramme per liter. As a rule, water containing as much as one one-hundredth of a gramme of chlorine per litre may be suspected of being contaminated with drainage. Whenever in water the oxygen amounts to less than one-third of the nitrogen, and the water also causes a considerable reduction of permanganate of potash, the presence of decomposing organic substance is probable. The capability of water to remain for some days at a temperature of about 22°C, without undergoing decomposition is of great importance in reference to the question of wholesomeness.” The permanganate of potash test given above was as follows: The test solution was distilled water, one litre, and permanganate of potash, one gramme. Of this solution, the number of drops required to render fifty cubic centimetres of the water under examination permanently red, were reported. It should be understood that the same quantity of distilled water required but eight drops of the test solution to become permanently red.