Scientific American, Volume XLIII., No. 25, December 18, 1880

A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures.

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Author: Various Authors
Published: 1880
Language: English
Wordcount: 39,591 / 130 pg
Flesch-Kincaid Reading Ease: 50
LoC Category: Q
Downloads: 700
Added to site: 2007.04.16
mnybks.net#: 16605
Genres: Periodical, Science
Excerpt

lan as this, by which workmen may be called upon to cope with an imaginary fire, and many of them will, we venture to say, find means of improving their present system or appliances for protection, elaborate as they may at present think them to be.

* * * * *


WHAT IS LIGHT?

If on opening a text book on geology one should find stated the view concerning the creation and age of the earth that was held a hundred years ago, and this view gravely put forward as a possible or alternative hypothesis with the current one deducible from the nebula theory, one would be excused for smiling while he turned to the title page to see who in the name of geology should write such stuff. Nevertheless this is precisely similar to what one will find in most treatises on physics for schools and colleges if he turns to the subject of light. For instance, I quote from a book edited by an eminent man of science in England, the book bearing the date 1873.

"There are two theories of light; one the

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