| Show THE TIDAL ACTING AS 9 A PERPETUAL DRAKE BRAKE ON THE ROTATION a in lieu no con two of or tho ho lur lare of growth naj br drear bray ay thlin t alie he I 1 mat ullo able oriler order of liture 1 the most interesting nacum 1 11 s li ments m n t a of mathematic mi il as a from rum a mundane standpoint at any rate are those that arfer to tho the e earth it rth a own oan satel liv at baya 1 dr williams a in 11 u tine ln ih it seemingly suld staid body nas aa ngo ago discovered to havo have a propensity 1 to gain a little on the earth swearing api caring at eclipses au infinitesimal moment ahead of time weri erf sorely puzzled by this act of ln in 1 subordination I 1 nation but at list laplace and lagrange explained it as duo file toj toi 1 an all oscillatory change in the earth a orbit thus fully exonerating the moon and deeming seeming to demonstrate demon strite ite tho tile ab f colitte st and permanence perman enco of aurl planetary pla netar system which th the m moon 0 O 0 n a lor had appt ired to th threaten thi eaten a tei ilits satisfactory conclusion was an orthodox ortho lox belief of me J chanice until 18 when prof adams of 0 neptunian tame fame with whom complex anal analyses sea were tt a pastime reviewed La laplace places a calculations and discord un tin error which when corrected left about half tho tile moon a acceleration unaccounted for tills this was i momentous momen tou toua t discrepancy which at first 1 no one could explain nut but presently prof hem holtz the great german sug that a key might be found in laj tidal friction which acting As a perpetual brel bral e on tho the earth a rotation and affecting not merely the waters but the entire substance of our planet mist must in the long sweep of time bavol havo changed ita its rate of rotation thus tho seeming acceleration ot of the moon moona 1 blight might bo be accounted tor for as an netted retardation tar dation of tho the earths rotation al a lengthening of the tile da day instead of a shortening of the month again tho the earth was shown to be at fault but thil tin tinn the tile moon could not bo be exonerated one rated while the estimated stability of 01 our batem instead of being ro re ss s 1 S was quite upset upsel vor or the tidal retardation is not an oacle 1 batory change which will presently lyl correct itself like ike the orbital rabble but a perpetual change acting always in one direction un esa ess fully corn ter acted by some opposing reaction therefore aa as tt it seems not to be the effect must be cumulative the consequences disastrous the exact character of these conse wa was first trot by prof 1 0 II 11 birwin in 1879 lie ile showed that bilal ti lal friction in retarding the earth must also push the mon out from the parent planet on a spiral orbit plainly then the moon must formerly have hase been nearer the earth than thin nt at present at some very remote period it must have actually touched the earth must in ln other words have been thrown off oft from the then plastic mass of the eau call as rj ri polyp buds out from its barei polyp poly at that ume time the earth was spinning about in a day of from two to hours now the day haa has been lengthened to twenty four hours and the moon baa has been thrust out a distance of ot a quarter million miles but the end Is 1 not yet the same progress of events must continue till ut at some remote period in the future the day haa has come to equal the month lunar tidal action haa has ceased and one face of the earth looks out always at the moon with that sair axed fixed stare which even now inow the moun motin haa has been brought to assume tow toward ard her parent orb I 1 ve we choose to take eien greater lver ties with the future it may be made to appear ili though ough some astronomers astron omera dissent from this prediction that as solar tidal action still continues the day must finally exceed the month mouth and lengthen out little by little toward coincidence with the year and that ua ta U a moon meantime must pause jn in its outward flight and come swinging back on a swinging spiral until finally alter after the lapee lapse of untold afons it plows and ricochets along the surface of the earth and plunges to catastrophic destruction st but dut even though imagination pause far chort phort of this direful culmination mi nation it still Is that modern calculation i based on inexorable tidal friction suffice to revolutionize the views formerly current as to the stability of the planetary system the eighteenth century mathematician looked upon this system as a vast 1 ce clestial machine which had been in existence about 6 years and which was destined to run on forever the rho analyst of today computes both the fast past and the future of this estem in millions instead of thousands of ears yet diets well assured that the solar system offers no contradiction to thos lawa laws ot 0 growth and decay which seem everywhere to represent the immutable order ot of nature 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