. Carnegie Institution of Washington publication. GENERAL DESCRIPTION OF RESPIRATION APPARATUS. TENSION EQUALIZER. brass rod is drawn into this opening, thus producing an air-tight closure. When in actual use during the process of weighing, a thin rubber diaphragm prevents leakage of air through this opening. The escape of heat through the weighing-tube is minimized by having this tube of hard rubber. VENTILATING AIR-CURRENT. The ventilating air-current is so adjusted that the air which leaves the chamber is caused to pass through purifiers, where the water-vapor and the carbon dioxide are rem
. Carnegie Institution of Washington publication. GENERAL DESCRIPTION OF RESPIRATION APPARATUS. TENSION EQUALIZER. brass rod is drawn into this opening, thus producing an air-tight closure. When in actual use during the process of weighing, a thin rubber diaphragm prevents leakage of air through this opening. The escape of heat through the weighing-tube is minimized by having this tube of hard rubber. VENTILATING AIR-CURRENT. The ventilating air-current is so adjusted that the air which leaves the chamber is caused to pass through purifiers, where the water-vapor and the carbon dioxide are removed, and then, after being replenished with fresh oxygen, it is returned to the chamber ready for use. The general scheme of the respi- ration apparatus is shown in fig. 27. The air leaving the chamber contains carbon di- oxide and water-vapor and the original amount of nitro- gen and is somewhat deficient in oxygen. In order to pur- ify the air it must be passed through absorbents for car- bonic acid and water-vapor and hence some pressure is necessary to force the gas through these purifying ves- sels. This pressure is ob- tained by a small positive rotary blower, which has been described previously in de- tail.* The air is thus forced successively through sulphu- ric acid, soda or potash lime, and again sulphuric acid. Finally it is directed back to the respiration chamber free from carbon dioxide and water and deficient in oxygen. Pure oxygen is admitted to the chamber to make up the deficiency, and the air thus regenerated is breathed again by the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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