A Treatise On Meteorology, With a Collection of Meteorological Tables
A Treatise On Meteorology, With a Collection of Meteorological Tables
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In our eReader you can find the full English version of the book. Read A Treatise On Meteorology, With a Collection of Meteorological Tables Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Treatise On Meteorology, With a Collection of Meteorological Tables
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337. Duration of Thunder. — Since a separate sound is produced Pig. 66. at each point along the entire line of the flash, and these points are generally at une- qual distances from the ob- server, the sounds produced at different points of the line of discharge, though in fact si- multaneous, reach the ear in slow succession. Thus an ob- server at A, Fig. 66, will first hear the sound resulting from the concussion at a, next at c, and finally at b. If b were 11,000 feet more remote than a, the ...first sound would be heard ten sec- onds before the last, and the thunder would be continuous for ten seconds.
The average duration of peals of thunder is 22 seconds, and the longest duration recorded is 56 seconds.
170 MKL'EOKOLOGY.
Tbe prolonged duration of some peals of thunder is in part the effect of echoes. In mountainous countries thunder peals are much longer continued, and the sound is more intense than in plane countries. This is due to the reflection of the thunder from the sides of the mountains in the same manner as the sound of a cannon is reflected.
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You can find similar books in the "Read Also" column, or choose other free books by Elias Loomis to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
337. Duration of Thunder. — Since a separate sound is produced Pig. 66. at each point along the entire line of the flash, and these points are generally at une- qual distances from the ob- server, the sounds produced at different points of the line of discharge, though in fact si- multaneous, reach the ear in slow succession. Thus an ob- server at A, Fig. 66, will first hear the sound resulting from the concussion at a, next at c, and finally at b. If b were 11,000 feet more remote than a, the ...first sound would be heard ten sec- onds before the last, and the thunder would be continuous for ten seconds.
The average duration of peals of thunder is 22 seconds, and the longest duration recorded is 56 seconds.
170 MKL'EOKOLOGY.
Tbe prolonged duration of some peals of thunder is in part the effect of echoes. In mountainous countries thunder peals are much longer continued, and the sound is more intense than in plane countries. This is due to the reflection of the thunder from the sides of the mountains in the same manner as the sound of a cannon is reflected.
What to read after A Treatise On Meteorology, With a Collection of Meteorological Tables?
You can find similar books in the "Read Also" column, or choose other free books by Elias Loomis to read onlineMoreLess
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