Overview :Tables of Instrumental Constants - and corrections for the reduction of transit observations made at the U. S. Naval Observatory is an uncha... Read More
Overview :This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This ... Read More
Overview :The Progress of Meteoric Astronomy in America - Read before the Philosophical Society of Washington, April 12, 1890 is an unchanged, high-qu... Read More