Science Daily

200 Years Later, Geologist Completes Lewis And Clark Readings

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 ...
Nature

Altitude Tables, computed for Intervals of Four Minutes between the Parallels of Latitude 0° and 30° and Parallels of Declination 0° and 24°, designed for the Determination ...

THE appearance of a second and improved edition of these tables is welcome on several grounds, but mainly as an indication of increasing accuracy in nautical calculations. We hope, too, that the ...
insider.si.edu

Altitude and Azimuth Instrument

The altitude and azimuth instruments made by Edward Troughton in London from the 1790s were remarkably stable and accurate, and Troughton & Simms continued this tradition. Indeed, Frederick W. Simms ...
Nature

(1) Nautical Astronomy (2) The “Newest” Navigation Altitude and Azimuth Tables for Facilitating the Determination of Lines of Position and Geographical Position at Sea

(1) NAUTICAL astronomy is simply the application of spherical trigonometry to the problem of ascertaining the latitude and longitude at sea by observations of the heavenly bodies; as also the errors ...