Boyd's directory of the District of Columbia (1876)
Washington, D.C. : W.H. Boyd · leaf 60
10 ItfOSfiTM^WK flPISOW CtOSE STOOi. Fig. 33 represents in perspective and Fig. 33. … Suggestions about Traps. When the trap is placed immediately below the container, as shown in iig. 34, the soil pipe below is filled with sewer gas, and generally under pressure in excess of the atmospheric pressure. It therefore seeks an escaj)e through any joint where there is the slightest…
Washington (D.C.) -- Directories
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
