 The simplest method of ventilation is to carry up method of rp ventilation- a shaft from the crown of the sewer to the surface of the street above, where it is covered by an iron grid.  Practical Domestic Hygiene - Page 221by James Lane Notter, Sir Robert Hammill Firth, Robert Hammill Firth - 1897 - 312 pagesFull view - About this book
 | 1886 - 1154 pages
...lamp-holes. " A man-hole is a brick shaft, capped with an iron frame having a perforated cover, built from the crown of the sewer to the surface of the street. A lamphole is a glazed pipe-shaft, six inches in diameter, capped with an iron frame with a perforated... | |
 | Rhode Island. State Board of Health - Rhode Island - 1886 - 380 pages
...lamp-holes. " A man-hole is a brick shaft, capped with an iron frame having a perforated cover, built from the crown of the sewer to the surface of the street. A lamphole is a glazed pipe-shaft, six inches in diameter, capped with an iron frame with a perforated... | |
 | William Henry Corfield - Fertilizers - 1887 - 552 pages
...of the factory, simplest The simplest method of ventilation is to carry up method of rp ventilation- a shaft from the crown of the sewer to the surface of the street above, where it is covered by an iron grid. The objection to this plan is that mud and gravel fall... | |
 | Milton Joseph Rosenau - Health - 1913 - 1140 pages
...direction of the flow of the current. The simplest plan of ventilation is by means of a shaft from the top of the sewer to the surface of the street or road above, where the opening of the shaft should be covered by an iron grating. These openings are usually placed... | |
 | Isaac Shone - Drainage - 1914 - 554 pages
...were connected with the furnaces of soap works. " The simplest method of ventilation is to carry up a shaft from the crown of the sewer to the surface of the street above, where it is covered by an iron grid. The objection to this plan is that mud and gravel fall... | |
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