Realm of Science October 20th 1916
Rigge, William F., S.J.
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First Paragraph: About three years ago the United States Naval Observatory at Washington, D. C, and the Observatory of Paris, France, began to exchange wireless time signals in order to determine their difference of longitude by the most modern apparatus that the advance of science had made possible. The method of star observations was also the best that had ever been devised. The American and French astronomers were each divided into two parties, and while one American and one French party made their observations with identical instruments in Washington, the second parties were in Paris. After spending several months in this work of recording star transits and wireless time signals, the Washington and Paris parties exchanged places and continued their work for an equal length of time in their second position.