 | Physiology - 1843 - 166 էջ
...as it is often called, vital air, is to life and respiration. It has been ascertained that a person breathes from 14 to 20 times in a minute, and inhales from 15 to 40 cubic inches of air at each breath ! GRACE. Then every minute of our lives we are taking in from... | |
 | 1844 - 602 էջ
...witness cases of fainting in crowded assemblies, produced by the same cause ? Now the assistant-draper, during much of the time which he spends in the shop,...inspiration, one man or woman breathes on an average 300 cubic inches of air every minute. At each inspiration one-half oí the oxygen is consumed, and its... | |
 | Massachusetts. Sanitary Commission - 1850 - 584 էջ
...appreciated, the following calculations may not be unimportant : An individual breathes, on an average, from 14 to 20 times in a minute, and inhales from 15 to 40 cubic inches of air at each inspiration. According to Southwood Smith, it appears that in one minute... | |
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Now the assistant - draper, during much of the time which he spends in the shop, breathes an atmosphere which has been rendered impure both by the exhalations of human bodies, and by the fixed air, or carbonic acid, which is given out by expiration, and... 