 | Royal Scottish Society of Arts - 1883 - 796 pages
...typhoid contagion, are cut off and effectually excluded from the house by a sound water trap. Water traps are therefore, for the purpose for which they are employed, that is, for the exclusion from the houses of injurious substances contained in the soil-pipe, perfectly trustworthy. They exclude... | |
 | 1881 - 762 pages
...His conclusion is that germa do not pass through the water. With reference to water-traps he says: "They exclude the soil-pipe atmosphere to such an...purified by filtration, as to be perfectly harmless." Dr. Carmichael regards my experiments with air contaminated with decayed meat, described briefly in... | |
 | United States. Congress. House - 1881 - 770 pages
...His conclusion is that genus do not pass through the water. With reference to water-traps he says: "They exclude the soil-pipe atmosphere to such an...the water is so little in amount, and so purified by filtratiou, as to be perfectly harmless." Dr. Carmichael regards my experiments with air contaminated... | |
 | Hugo Ziemssen - 1881 - 872 pages
...some valuable experiments in regard to water traps and closets. He concludes that: Water traps arc for the purpose for which they are employed, that...from houses of injurious substances contained in the soil pipe, perfectly trustworthy. They exclude the soil pipe atmosphere to such an extent that what... | |
 | Rhode Island. State Board of Health - 1881 - 694 pages
...sums up his conclusions by saying: '•" Water-trap:are, therefore, for the purpose for which they arc employed, that is. for the exclusion from houses of injurious substances contained in the soil pipe, perfectly trustworthy. They exclude the soil pipe atmosphere to such an extent that what... | |
 | William Paul Gerhard - 1882 - 270 pages
...after careful investigations and experiments. Dr. Carmichael sums up his conclusions by saying : " Water-traps are, therefore, for the purpose for which...the water is so little in amount and so purified by nitration as to be perfectly harmless; and they exclude entirely all germs and particles, including,... | |
 | 1882 - 592 pages
...therefore for the purpose for which they are employed perfectly trustworthy. They exclude the sewer air to such an extent that what escapes through the water...exclude entirely all germs and particles including the specific germs or contagia of disease. We have them at our command a simple, complete safeguard... | |
 | William Paul Gerhard - 1882 - 258 pages
...careful investigations and experiments. Dr. Carmichael sums up his conclusions by saying : " Water traps are, therefore, for the purpose for which they are...from houses of injurious substances contained in the soil pipe, perfectly trustworthy. They exclude the soil pipe atmosphere to such an extent that what... | |
 | 1882 - 536 pages
...careful investigations and experiments. Dr. Carmichael sums up his conclusions by saying : " Water traps are, therefore, for the purpose for which they are...from houses of injurious substances contained in the soil pipe, perfectly trustworthy. They exclude the soil pipe atmosphere to such an extent that what... | |
 | William Paul Gerhard - 1882 - 242 pages
...careful investigations and experiments. Dr. Carmichael sums up his conclusions by saying: "Water traps are, therefore, for the purpose for which they are...from houses of injurious substances contained in the soil pipe, perfectly trustworthy. They exclude the soil pipe atmosphere to such an extent that what... | |
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They exclude the soil pipe atmosphere to such an extent that what escapes through the water is so little in amount, and so purified by filtration, as to be perfectly harmless ; and they exclude entirely all germs and particles. 
