 | William Shepherd, Jeremiah Joyce, Lant Carpenter - Education - 1815 - 598 pages
...circles which are formed on throwing a stone into smooth water ; and these waves of the air, travelling at the rate of eleven hundred and forty-two feet in a second, strike against the external ear : here they are collected and conveyed through the canal to the membrane... | |
 | Levi Washburn Leonard - New Hampshire - 1827 - 398 pages
...see the light of the flash long before we hear the report. The velocity of sound is commonly computed at the rate of eleven hundred and forty-two feet in a second. Its velocity varies according to the temperature, density, and humidity of the atmosphere. It is influenced... | |
 | Levi Washburn Leonard - Science - 1830 - 350 pages
...see the light of the flash long before we hear the report. The velocity of sound is commonly computed at the rate of eleven hundred and forty-two feet in a second. Its velocity varies according to the temperature, density, and humidity of the atmosphere. It is influenced... | |
 | Bela Bates Edwards - Readers - 1832 - 338 pages
...earth.—It is not difficult to measure the distance of thunder-clouds from the earth. Sound moves at the rate of eleven hundred and forty-two feet in a second; light at the rate of about two hundred thousand miles in a second. The time in which light traverses... | |
 | Charles Alfred Lee - Human physiology - 1843 - 346 pages
...here the sound had to be communicated from the air to the water, and from the water to the air again. Sound travels at the rate of eleven hundred and forty-two feet in a second, or a mile in four seconds. As light travels much faster, we see the flash of a gun before we hear the... | |
 | Lydia Folger Fowler - Phrenology - 1848 - 354 pages
...around the eyes, are the servants of the* eye, and without their master, are comparatively useless. HEARING. 1. The ear is the organ of hearing. It has...hearing be not impaired, we can tell the approach of a thunder-storm very accurately. We always see the flash of lightning first, and if we count the number... | |
 | Timothy Stone Pinneo - Readers - 1847 - 502 pages
...the earth. It is not difficult to measure the distance of thunder-clouds from the earth. Sound moves at the rate of eleven hundred and forty-two feet in a second ; light at the rate of about two hundred thousand miles in a second. The time in which light traverses... | |
 | Lydia Folger Fowler - Mind and body - 1854 - 326 pages
...lighted one, and the opposite 5. What is said of the organ of sight ? SOUND THE VIBRATION OF THE AIR. 205 HEARING. 1. The ear is the organ of hearing. It...sound ? Illustrate this. 3. How do we know that air ia necessary for sound ? What have some supposed ? Give an example. 4. What is the speed of sound ?... | |
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HEARING. 1. The ear is the organ of hearing. It has many divisions, which I am afraid you would not remember if I should tell you. The nerve which conveys impressions to the brain is called the auditory. The ear has no opening into the brain, so that... 