SIGNAL SERVICE 420
Origin of Signal Service—Scientific and useful character—Mode
of conducting it—School of Instruction—Grades of officers—Their
duties—Number of Stations—Smithsonian Institution—Its Origin,
Objects and Value.
CHAPTER LIV.
The Footprints of Time And a Complete Analysis of Our American System of Government, with a Concise History of the Original Colonies and of the United States, in Chronological Order · 第 54 / 82 章