. Denmark; its medical organization, hygiene and demography . plan attached,on which also the localities above mentioned are indicated. The terri-tory examined comprises about 4tV square mil (25,531*2 hektars).The blue contour lines indicate the rise of the subterranean water inthe wells on pumping. Special signatures indicate the pumping sta-tions existing and the location of pumping wells; also the localitiesof the experimental borings. Scattered black figures indicate theelevation of the country in fod* above the level of the sea. Examinationwas also made of the surface of the chalk and of
. Denmark; its medical organization, hygiene and demography . plan attached,on which also the localities above mentioned are indicated. The terri-tory examined comprises about 4tV square mil (25,531*2 hektars).The blue contour lines indicate the rise of the subterranean water inthe wells on pumping. Special signatures indicate the pumping sta-tions existing and the location of pumping wells; also the localitiesof the experimental borings. Scattered black figures indicate theelevation of the country in fod* above the level of the sea. Examinationwas also made of the surface of the chalk and of the quantity ofwater obtained by each boring at a certain distance below the sur-face, also of the water rise during pumping, as well as some timeafter the pumping from the wells had ceased. By these investigationsit became apparent, that no necessity existed for drawing the watersupply from those parts of the subterranean water areas, sendingtheir water directly towards the shore, their water rise being slight * 1 Danish fod=0*314 meter^l*03 English WATER SUPPLY IN THE METROPOLIS. 73 and their quantity small. The valley, in which the previous wellswere sunk, was already exhausted; but North of it a special sub-terranean water territory was found with outlet towards West andlow rise near Sonder Lake, where large quantities may be taken,especially because above the chalk are great layers of boulders, inwhich the water presents very slight resistance to motion. The waterrise in the neighbourhood of the Sonder Lake pumping station is about19 fod (5*96 meters) above the level of the lake. Here a series ofborings are made, having outlet to a collecting conduit, leading tothe pumping station already existing at Sonder Lake, which willhave to be enlarged, unless a line should happen to be found, bywhich a tunnel might be conducted, at a reasonable cost, under thesupraterranean watershed to the valley near the wellsprings, fromwhich now a large covered concrete conduit is built
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