Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Том 7American Philosophical Society, 1967 |
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Сторінка 317
... hour clock , in order to have the necessary power to move the hammer , requires to have each alternate pin removed ... hour . A peculiar arrangement , difficult of description , enables me to change the rates from quarter - hour to half ...
... hour clock , in order to have the necessary power to move the hammer , requires to have each alternate pin removed ... hour . A peculiar arrangement , difficult of description , enables me to change the rates from quarter - hour to half ...
Сторінка 339
... hours of the day , and are simultaneously removed five minutes after each hour . The record - curves ( barometric on the one side of the slate , and thermometric on the other ) , consist therefore of short lines , each ten minutes long ...
... hours of the day , and are simultaneously removed five minutes after each hour . The record - curves ( barometric on the one side of the slate , and thermometric on the other ) , consist therefore of short lines , each ten minutes long ...
Сторінка 380
... hour , it can only be determined with precision by means of numerous observations made at short intervals of time , say three to five minutes apart , from about one hour before to one hour after the turn of the tide from ebb to flood ...
... hour , it can only be determined with precision by means of numerous observations made at short intervals of time , say three to five minutes apart , from about one hour before to one hour after the turn of the tide from ebb to flood ...
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12 observations 1st Mean 1st Set 2d Set Acad Academy April Bache Buffalo Chicago by mean Chicago mean solar Chicago observing station Chicago reduced sidereal Chicago signals City of Rock Cleveland comparison-Chronometer Coronæ correct sidereal Cresson Cygni dated dereal Determination Difference of Longitude Dunleith east Electric signals sent Elyria fast of sidereal following donations Franklin Institute Fulton goth Isaac Lea January January 21 John Reynell Journal July June Latitude Leonis Library were announced Longitude of Chicago Madison March mean solar Chronometer meridian of Chicago meridian of Greenwich Michigan City Nuttall Pending nomination Phila Philadelphia Polaris Prairie du Chien Proc Proceedings Prof Rate per mean Rate per sidereal Report Result adopted-Chronometer Rock Island sent from Chicago shine Sidereal chronometer sidereal day sidereal hour signals given signals recorded slow of mean sound station at 9h Street time-observations tion Toledo