Word: polarity
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Dates: during 1890-1899
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Boston Theatre.- Under the Polar Star...
Boston Theatre.- Under the Polar Star...
Boston Theatre.- Under the Polar Star...
Boston Theatre.- Under the Polar Star...
...extensive series of observations was also made upon Mars. More than forty minute black points were discovered, provisionally designated as lakes. The polar compression of the planet was also measured and appeared to be greater than that indicated by theory, which may be due to an excess of clouds in the equatorial regions. The presence of the dark and narrow streaks, called canals by Schiaparelli, has been confirmed, and various measurements of them have been made. The clouds projecting beyond the limb and terminator have been studied, and their height has been found to be at least twenty miles...