Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 273
me,the time to ahundredth ofasecondwhichis recorded inthe catalogueof stars. The obser-ver holds inhis hand, as hesits below thetelescope, thetelegraphickey attachedto a long wirerunning outinto anotherroom, wherethe wire is at-tached to alittle instru-ment calledthe chrono-graph, that… … the hundredth of a second,these many centuries. Going into anotherroom, the observer sitsdown at a telescope ofmedium size—perhaps fivefeet in length. It is somounted that it cannotbe moved like one of thegreat telescopes, but mustalways be pointed directlyat the meridian, througha narrow slit in…
Children's literature
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