-----------------+-------+--------------+--------------+-------------- Parts per | April.| May. | June. | July. 100,000. +-------+-------+------+------+-------+-------+------ | 3rd. | 6th. | 26th.| 13th.| 30th. | 15th. | 30th. -----------------+-------+-------+------+------+-------+-------+------ Appearance, &c. | Cl. |Sl. Tb.| Tb. | Cl. | Cl. | Cl. | Cl. Odour (heated to | None | None | None | None | None | None | None 100° Fahr.). | | | | | | | Chlorine in |0·278 |0·348 |0·244 |0·348 |0·226 |0·279 |0·226 chlorides. | | | | | | | Equivalent to |0·459 |0·575 |0·400 |0·574 |0·374 |0·459 |0·374 sodium | | | | | | | chloride. | | | | | | | Phosphates. | None | None | None | None | None | None | None Nitrites. | None | None | None | None | None | None | None Nitrogen in | 0·0403|0·0494 |0·034 |0·0469|0·0371 |0·0395 |0·0387 nitrates and | | | | | | | nitrites. | | | | | | | Free ammonia. | 0·001 |0 |0·002 |0·003 |0·0005 |0·002 |0·003 Albuminoid | 0·009 |0·0166 |0·0086|0·007 |0·014 |0·008 |0·011 ammonia. | | | | | | | “Hardness” | | | | | | | equivalent | | | | | | | to carbonate of | | | | | | | lime-- | | | | | | | Before boiling.| 4·73 |4·082 |4·280 |3·860 |4·968 |4·268 |4·332 After boiling. | 4·31 |3·787 |3·510 |3·500 |4·586 |4·268 |4·332 Organic and | 6·00 |1·500 |3·00 |2·50 |2·00 |0·50 |2·50 volatile | | | | | | | (loss on | | | | | | | ignition). | | | | | | | Mineral matter | 5·00 |4·000 |4·50 |4·50 |5·50 |5·00 |5·00 (non volatile). | | | | | | | Total solids (by |11·00 |5·50 |7·50 |7·00 |7·50 |5·50 |7·50 evaporation). | | | | | | | -----------------+-------+-------+------+------+-------+-------+------