. This is a slow and costly process, ish government for some time past, and a few months voirs are filled by pumping water from an adjoining and places the filter beds periodically out of service ago the department of the Board of Trade established river, into which the sewage of towns and villages… … cities using mechanical filtration, in which the aver- under its full compression charge. It is not neces- age number of typhoid fever deaths for the year 1895 A COMPBESSED-AIB LIFE LINE CANNON. sary to use the maximum compression charge when effecting communication over a shorter intervening per…
Motor · Water · Torpedo · Manufacturers · Sand · Catalog · American supplement · Scientific American · Iver johnson · Jerome park · Slow sand · Stereoscopic relief · Torpedo boat · Reinforced concrete · Triple action · Gear wheel
Internet Archive · Public domain (published before 1931). Free to use for anything.
