================================================+=======+=========+======== |Organic| Organic |Previous |Carbon.|Nitrogen.| Sewage. ------------------------------------------------+-------+---------+-------- | parts | parts | Rain-water, collected in leaden gauges | .070 | .015 | 42 “ “ “ from roofs, etc., for | .257 | .080 | 12031 domestic use | | | Dew or hoar frost collected on leaden gauges | .264 | .076 | 1536 Sea-water | .278 | .165 | 103 Upland surface, from non-calcareous strata | .278 | .033 | 0 “ “ from calcareous strata | .346 | .037 | 33 Land drainage water, from sewage farms | .082 | .191 | 10443 Deep well waters, in the chalk below London clay| .093 | .028 | 797 Spring waters, from the chalk | .044 | .010 | 3511 Bristol, from springs and deep wells | .172 | .024 | 16620 Edinburgh, from springs and streams-- | .145 | .026 | 2020 water filtered | | | Glasgow, from Loch Katrine | .204 | .017 | 0 Liverpool, Green Lane well | .020 | .020 | 3840 “ Rivington River, gravity supply, | .243 | .031 | 0 unfiltered | | | “ “ “ gravity supply, | .210 | .029 | 0 filtered | | | Birmingham, from Bourne River, normal | .211 | .039 | 2480 “ “ “ “ in flood | .640 | .059 | 3890 “ “ “ “ filtered | .460 | .045 | 2720 “ from Aston well | .034 | .006 | 1440 “ mixed waters--river and well | .040 | .010 | 1380 London, Thames water from Hampton | .246 | .033 | 3270 Grand Junction Works | | | “ “ “ after subsidence “ “ “ | .262 | .042 | 3270 “ “ “ after filtration “ “ “ | .231 | .032 | 3140 Jacob’s Shallow Well, at Sheffield | 1.200 | .126 | 590 ------------------------------------------------+-------+---------+--------