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 ...
THE remarkable paper on Stonehenge, by Sir N. Lockyer and Mr. Penrose, in NATURE of November 21 has greatly interested me. Just two years ago, I was working at the subject, and wrote to Prof. Petrie ...
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 the oldest determinations of the ...
IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. The Rude Star Finder lets a navigator ...
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