VI.—THE FINDING OF DATES. (i) By Solstitial Alignments. IN the astronomical study of ancient monuments, the archæologist's measures of azimuth and altitude enable him to determine the declination of ...
A LEADING feature of present-day methods of navigation is the use of tables. There is scarcely any method in use in navigation for which one, and probably many, tables, of more or less practical ...
Lewis and Clark, meet Robert Criss. Virtual explorer Robert Criss, Ph.D., professor of earth and planetary sciences at Washington University in St. Louis, has teamed up with Lewis and Clark to provide ...
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