NEW TIME-KECKONING. 



351 



period aiiives wlioii the uniticatioiiof time \\'ill be coiiii)lete. In tlienot 

 far distant liiturc it may become eqlially as uiiiieeessary to speak of 

 " Solar," " Lunar," "Astronomical," "Civil," "Nautical," "Local," " Cos- 

 mic," or " World" time, as at present it is unnecessary to attach these or 

 other distinctive appellations to "Space." Thesimple expression "Time" 

 may then become sufficient for all purposes. 



Loiigitiulo ea>st iiiul west 

 Iroiii Grcouwich. 



180 

 1(55 

 150 

 i:35 

 120 

 105 



yo 



75 



GO 



45 



30 



15 







15 



30 



45 



(50 



75 



00 



105 



I'JO 



135 



150 



1(15 



180 



aiitipriiiie meridian. 



east 



east 



east 



east . 

 east . 

 east 

 east , 

 east 

 east . 

 east , 

 east 



the i>riuie nicridiau 



west 



west 



west 



west 



west 



west 



west 



west 



west 



west 



west 



autipriine meridian 



Loiij;itude 

 wt^st I'roiu 

 time zero. 



15 



30 

 45 



(iO 



75 



00 



105 



!>,>() 



135 



150 



Km 



1«0 



195 



210 



225 



240 



255 



270 



2r<5 



300 



315 



330 



345 



300 aud 



3 



Longitude 



by hour 

 meridiaus. 



XiDubcr. 

 

 1 

 2 

 3 

 4 



(■) 



7 



8 







10 



11 



12 



13 



14 



15 



k; 



17 



18 

 10 

 20 

 21 

 22 

 23 

 and 24 



Cosmic Time at 



mean solar 



passage. 



Hour. 

 Change of the dav. 

 1 

 2 

 3 

 4 

 5 



r» 



7 



8 



9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 aud change. 



* Zero of Cosmic Time and of Longitude. 



The relation between time aud longitude is important. If longitude 

 be reckoned by hour meridians, as in the second and third columns of 

 the table, that is to say, numbered continually westward from the Anti- 

 prime Meridian, which is the true time zero, the inhabitants of every 

 individual locality in whatever longitude willdaily have an opportunity 

 of regulating time by the great natural standard of measurement. 

 The longitude of the locality being known, at mean solar passage the 

 time will invariably and precisely agree with the longitude. Con- 

 versely, the time being known, the longitude of the place will be in 

 strict agreement with time at the moment of mean solar passage. 



A reference to the following plate will make it clear that the solar 

 passage will be the invariable index of Cosmic Time. 



Fig. 1 shows the relative position of sun and earth at the initial in- 

 stant of the Cosmic Day, that is, at the moment of mean solar passage 

 on the Antiprime Meridian adopted by the Washington Conference. 



