The Principles of hygieneW.B. Saunders Company, 1914 - 525 pages |
From inside the book
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Page 70
... necessary to wash or filter the air before it is distributed . The current of incoming air should be imperceptible . This is of special importance when , as is generally the case , the temperature of the outer air is lower than that of ...
... necessary to wash or filter the air before it is distributed . The current of incoming air should be imperceptible . This is of special importance when , as is generally the case , the temperature of the outer air is lower than that of ...
Page 82
... necessary on account of friction . The sectional area of the conduit being known , the delivery per second can be calculated from these data . Pumps are employed in the ventilation of mines , and may be used either for forcing in fresh ...
... necessary on account of friction . The sectional area of the conduit being known , the delivery per second can be calculated from these data . Pumps are employed in the ventilation of mines , and may be used either for forcing in fresh ...
Page 84
... necessary in propulsion methods , and inatten- tion to this point has in many instances brought the method into disrepute . Where the air has been pre- viously filtered there will , of course , be less deposit of dust on the sides of ...
... necessary in propulsion methods , and inatten- tion to this point has in many instances brought the method into disrepute . Where the air has been pre- viously filtered there will , of course , be less deposit of dust on the sides of ...
Page 86
... , theaters , and schools arti- ficial ventilation is necessary . In buildings of this char- acter mechanical methods have a decided advantage over FIG . 20. - Apparatus for removing dust in manufacturing 86 VENTILATION .
... , theaters , and schools arti- ficial ventilation is necessary . In buildings of this char- acter mechanical methods have a decided advantage over FIG . 20. - Apparatus for removing dust in manufacturing 86 VENTILATION .
Page 88
... necessary for several reasons . The combustion of coal utilizes oxygen , and as a result the products of combustion are given off . In order to supply air for combustion and draught fresh air must be introduced . It is also necessary to ...
... necessary for several reasons . The combustion of coal utilizes oxygen , and as a result the products of combustion are given off . In order to supply air for combustion and draught fresh air must be introduced . It is also necessary to ...
Common terms and phrases
acid ammonia amount animal apparatus bacillus bacteria blood body calories carbolic acid carbon dioxid cause cent centimeters chemical chlorid cholera climate clothing contained cubic meters death-rate deaths diet digestion diphtheria disinfection dust effects employed especially filter filtration fleas formaldehyd frequently fresh air grams Gynecology heat hygienic immunity important impurities increased infection infectious diseases influence injurious inspection Isolation and disinfection kilograms locality malaria Marine-Hospital Service meat method milk mosquitoes nature necessary nitrogen Obstetrics obtained organic matter oxygen parasites passengers patient persons pipe plague poisonous polluted port prevent produced proteid Public Health purification quantity quarantine quarantine officer quarantine station rats regulations removed salts sanitary scarlet fever serum sewage small-pox soil solution steam substances sulphur dioxid supply surface tank temperature tion tuberculosis typhoid fever United vaccination vegetable ventilation vessel weight yellow fever
Popular passages
Page 457 - Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled.
Page 453 - An act granting additional quarantine powers and imposing additional duties upon the Marine Hospital Service...
Page 499 - Treasury, necessary to prevent the introduction of contagious or infectious disea-ses into the United States from foreign countries or into one State or Territory or the District of Columbia...