+-----------------------+-----------------------++----------------------+ | | THAMES WATER. || CROTON WATER. | | +------------+----------++---------+------------+ | QUANTITY OF WATER. |_Brentford._|_Chelsea._|| At its | In the | | 1 Gallon = 10 lbs. | Source of | Source || source, | City of | | Avoirdupois, at | the Grand | of the || _Croton | _New-York_ | | 62° Fah., or 70, grs. | Junction | Chelsea || Lake._ | as it | | Avoirdupois. |Water Works | Water || |issues from | | | Company. | Works || | the pipes. | | | | Company. || | | +-----------------------+------------+----------++---------+------------+ | | Grains. | Grains. || Grains. | Grains. | |Carbonate of Lime, | 16·000 | 16·500 || 1·42 | 1·52 | |Sulphate of Lime, } | | || ·00 | ·44 | |Chloride of Sodium, } | 3·400 | 2·900 || | | |Oxide of Iron, } | | || | | |Silica, } | very | || | | |Magnesia, } | minute | Ditto. || ·34 | ·46 | |Carbonaceous Matter, } | portions. | || | | |Chloride of Magnesium,}| | || ·86 | ·90 | |Chloride of Calcium, }| | || | | |Carbonate of Magnesia, | | || ·70 | ·84 | | | | || | | |Solid matter held in | | || | | | solution, | 19·400 | 19·400 || 2·98 | 3·70 | |Mechanical impurity, | 0·368 | 0·238 || ·34 | ·46 | | +------------+----------++---------+------------+ |Total solid matter, | 19·768 | 19·638 || 3·32 | 4·16 | +-----------------------+------------+----------++---------+------------+ Analysis of the Croton and Schuylkill waters, by J. C. Booth, Professor of Chemistry to the Franklin Institute of Pennsylvania, and H. M. Boye, of Philadelphia.