A Century of Science in America With Special Reference to the American Journal
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Although, as has been shown, the beginnings of min- eralogy lie in the remote past, the science, as we know it to-day, can be said to have had practically its whole growth during the last one hundred years. Of the more than one thousand mineral species that may now be con- sidered as definitely established hardly more than two hundred were known in the year 1800 and these were only partially described or understood. It is true that Haiiy, the "father of crystallography, " had before this date d...is- covered and formulated the laws of crystal symmetry, and had shown that rational relations existed between the intercepts upon the axes of the different faces of a crystal. It was not until 1809, however, that Wollaston described the first form of a reflecting goniometer, and thus made possible the beginning of exact investigation of crystals. The distinctions between the different crys- tal groups were developed by Bernhardi, Weiss and Mohs between the years 1807 and 1820, while the Naumann system of crystal symbols was not proposed until 1826.
What to read after A Century of Science in America With Special Reference to the American Journal?
You can find similar books in the "Read Also" column, or choose other free books by Edward Salisbury Dana to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Although, as has been shown, the beginnings of min- eralogy lie in the remote past, the science, as we know it to-day, can be said to have had practically its whole growth during the last one hundred years. Of the more than one thousand mineral species that may now be con- sidered as definitely established hardly more than two hundred were known in the year 1800 and these were only partially described or understood. It is true that Haiiy, the "father of crystallography, " had before this date d...is- covered and formulated the laws of crystal symmetry, and had shown that rational relations existed between the intercepts upon the axes of the different faces of a crystal. It was not until 1809, however, that Wollaston described the first form of a reflecting goniometer, and thus made possible the beginning of exact investigation of crystals. The distinctions between the different crys- tal groups were developed by Bernhardi, Weiss and Mohs between the years 1807 and 1820, while the Naumann system of crystal symbols was not proposed until 1826.
What to read after A Century of Science in America With Special Reference to the American Journal?
You can find similar books in the "Read Also" column, or choose other free books by Edward Salisbury Dana to read onlineMoreLess
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