 | 1889 - 318 pages
...Have all the pipes in sight and accessible. Where chemicals are poured down the sinks use cesspool covers. These are circular pieces of wood covered...and by keeping the inlet openings well down. Some years ago the writer served as a junior member upon a hall committee to overlook the construction of... | |
 | American Public Health Association - 1886 - 222 pages
...man descend one hundred feet by this means. This style of escape can have only a partial approval. The simplest of all escapes is a rope long enough...and by keeping the inlet openings well down. Some years ago the writer served as a junior member upon a hall committee to overlook the construction of... | |
 | American Public Health Association - 1886 - 248 pages
...man descend one hundred feet by this means. This style of escape can have only a partial approval. The simplest of all escapes is a rope long enough...and by keeping the inlet openings well down. Some years ago the writer served as a junior member upon a hall committee to overlook the construction of... | |
 | New Hampshire. State Department of Health - 1887 - 314 pages
...trapped. Have all the pipes in sight and accessible. Where chemicals are poured down sinks use cesspool covers. These are circular pieces of wood covered...accomplished by placing the top openings, whether into air-shafts or to the outside, well up, and by keeping the inlet openings well down. Some years ago... | |
 | 1887 - 334 pages
...trapped. Have all the pipes in sight and accessible. Where chemicals are poured down sinks use cesspool covers. These are circular pieces of wood covered...accomplished by placing the top openings, whether into air-shafts or to the outside, well up, and by keeping the inlet openings well down. Some years ago... | |
 | Indiana State Board of Health - 1889 - 304 pages
...Have all the pipes in sight and accessible. Where chemicals are poured down the sinks use cesspool covers. These are circular pieces of wood covered...and by keeping the inlet openings well down. Some years ago the writer served as a junior member upon a hall committee to overlook the construction of... | |
| |
Where chemicals are poured down the sinks, use cesspools covers. These are circular pieces of wood covered on the under side with lead and rubber, and having an earthen knob on top. Ventilation should be such that a change of air is effected without drafts... 