{"newspaper_name": "Mobile register and journal.", "edition": "01", "page": "p2", "byline": ""}
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 The Washington Union acknowledges the receipt Of a very yaluabe,volume from Lieutenant Maury, con taning the results of the astronomical observations conducted al the Observatory in Washington duIing the year l945 The Union takes the occasion to re- mark upon the extremely important uses to which the magnetic telegraph can be put for astronomical purposes and especially in the determination of lon

 gtudes. Lieutenant Manry explains, that as the speed ofhe magnetic fluid surpssses inc velocity of light, this fact ia taken advantage of for determiaing differences of longitude between Washington city and the principal cities of the Union. When il is re-

 menbetcd what time, labor and money haze been expended by astronomers in the solution of this pro blem, the importance of ihe new process may be readily imagined Instead O. sending out an expe- dlon,' al great cost its contemplated only to send an officer with small instrument from place to place. Being at his station he udyiseg, by ele- graph his principal al he observatory of the fact, and receives nns@er to be ready that the star is ap- proachlng the merilan of Washington; al the mo- ment of cumnaiion here the sign is gisen, and the time IS noted there also. In little while the wiry messenger brings word from the west that the stari5 approaching that distant meridian, and ai the instant ofiis transit there the signal is repeated

 Thsre can be no mistake, therefore, in ihe perfect determination of the distance Of Ihe two placcs