Ventilation, Heating, and LightingSanitary Publishing Company, 1907 - 151 pages |
Autres éditions - Tout afficher
Ventilation, Heating, and Lighting (Classic Reprint) William H. Maxwell Aucun aperçu disponible - 2017 |
Ventilation, Heating, and Lighting (Classic Reprint) William H. Maxwell Aucun aperçu disponible - 2018 |
Expressions et termes fréquents
admitted AIR FLUE air inlet air supply amount apparatus arrangement artificial ventilation atmosphere boiler building burner candle carbonic acid ceiling chamber cistern CO₂ coal coal gas combustion cowl Crown 8vo cubic feet cubic foot cubic space cylinder Drainage draught Electric extract shafts fans FETTER LANE fire fireplace fixed floor space flow pipe flue foul air fresh air gases grate heat height hot water House Hygiene illumination Illustrations impure incandescent inlet air iron lamp light London London County Council low-pressure means mechanical ventilation Medical Officer method Municipal natural ventilation numerous Officer of Health ordinary organic matter outlets oxygen placed practical pressure Public Health radiation respiration Sanitary Engineers Sanitary Inspectors Sanitary Science Sewage sewer air smoke square feet square inch steam stoves Street surface tion tube upcast valve velocity vitiated air warm air wind
Fréquemment cités
Page 15 - By-laws with respect to the level, width, and construction of new streets. Part II. comprises the points which have to be considered in the making up of private streets under powers conferred by various Acts, with selected enactments and an appendix of the Private Street Works Act, 1892.
Page 121 - The heat should be moderate and evenly distributed so as to maintain a temperature of from 56 degrees to 60 degrees. When a corridor or lobby is warmed, the rooms are more evenly dealt with and are less liable to. cold draughts. Where schools are wholly warmed by hot water, the principle of direct radiation is recommended. In such cases open fireplaces in addition are useful for extra warming on occasions, and their flues for ventilation always. (a) A common stove, with a pipe through the wall or...
Page 104 - II. For a given pressure ebullition commences at a certain temperature, which varies in different liquids, but which, for equal pressures, is always the same in the same liquid. III. Whatever be the intensity of the source of heat, as soon as ebullition commences, the temperature of the liquid remains stationary.
Page 2 - Thus it appears that in all climates, and under all conditions of life, the purity of the atmosphere habitually respired is essential to the maintenance of that power of resisting disease, which, even more than the ordinary state of health, is a measure of the real vigour of the system. For, owing to the extraordinary capability which the human body possesses of accommodating itself to circumstances, it not unfrequently happens that individuals continue for years to breathe a most unwholesome atmosphere,...
Page 5 - This edition has been entirely re-written and revised, with such additions as to bring the subject up to the present time. The enlargement of the section on Food Preservatives will make it a manual of practical value to those engaged in many of our largest trades and industries.
Page 27 - The direction of the currents of air from the human body is, under ordinary conditions, upwards, owing to the heat of the body. This current is an assistance to upward, and an obstacle to downward, ventilation. "2. The heat from all...
Page 5 - ... be, the expired air is always saturated with watery vapor, and, no matter what the temperature of the external air may be, that of the exhaled air is always nearly as warm as the blood. An adult man on a average breathes about sixteen times in a minute and at every inspiration takes in about thirty cubic inches of air, and at every expiration exhales about the same amount. Hence, it follows that about...
Page 22 - We see also from the formula that the velocity is inversely as the square root of the density of the gas — the pressure being the same. Thus, a soundwave travels about four times faster in hydrogen than in air.
Page 27 - ... the air by the lights if the downward method be adopted. " 3. In large rooms an enormous quantity of air must be introduced in the downward method if the occupants are to breathe pure fresh air, or about three times the amount which is found to give satisfactory results with the upward method. " 4. In halls arranged with galleries, the difficulty of so arranging downward currents that, on the one hand, the air rendered impure in the galleries shall not contaminate that which is descending to...
Page 34 - The best way of providing the latter is to build to each room a separate air chimney carried up in the same stack with smoke flues. An outlet should be by a warm flue or exhaust, otherwise it will frequently act as a cold inlet. Inlets are best placed in corners of rooms furthest from doors and fireplaces, and should be arranged to discharge upwards into the room. Gratings in floors should never be provided.