My uncle was careful to note every hour the indications of the compass, of the manometer, and of the thermometer, all which he afterwards published in...

If my astonishment increased, my patience was well-nigh exhausted. What natural force could possibly have produced such abnormal and extraordinary pla...

Thus at Yakoust in Siberia, it has been remarked that the heat increases a degree every thirty-six feet. The difference evidently depends on the condu...