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By the Atsovioted Press YORK, Dec, 27.—Dr. Albert dineteln whose theaty of jrelativity helped open up the whole ‘vast fleld of atomic research, has put forward an even more aensa- ional theory. He calls it “e generalized theory gravitation.” It ls a mathematical description ‘the mystery of gravity—the mon force that keeps our feet fp the for and rules the move- rents of the stars, If it can be proved, it will ‘pe- ‘come a “universal law” and, in the view of other scientists, will stand as the highest scientific ‘hievement of all time.: It would explain every physical jotion in the universe, from the ide of an atom to the enormous les of outer space, No oo ee eee ‘instein Presents New Theory. All Motion in Universe Scientist Extends Relativity Ideas, Which - Opened Atomic Field, to Gravity Mystery C i 7 Tt would crown with success the life work of Dr. Einstein, who has spent the last half of his 70 years ooking for the answer to this ultl- mate problem, known to aclence jas the “unified fleld theory.” ‘It was revealed to the world here yesterday gn 30 niimeographed Pages—ae mixture of typewritten words and squiggly mathematical symbols that even scientists hes: itated to interpret. It was the Eng translation of Dr. Einstein’ al German: Dr, Einstein describes it as extension of his relativity theory, And was quick to point out that he has “not yet found a practical way to confront the results of the the- ory with experimental evidence”— or in short, to-prove it. When he published thé “general { “Beveral times before, | SI Mias* thought he ;Siswer, then discarded his ‘dens as faulty, But now his friends think he hss actually discovered it, the magazine Scientific Ameri- can sald in @ parallel article. “He is sald to have told close associates that he regards it a his greatest achievement,” the magazine said. “He is reported to have given enthusiastic black- board sxplanations of his equa- tons.” But proof, it the theory can be Proved, may take years, and any Practical use may take years. longer. In earlier theorles, Dr. Einstein ; linked up space-and-time, matter- .)and-energy, and gravitation-and- inertia, as all parts of a single concept. But one great force was let out—electromagnetism. This what creates “electricity” and it tke gravitation, an invisible f The new theory now includes electromagnetism, and tt and grav- itation are now viewed as two theory of relativity” in 1915, Dr. Einstein suggested several actu ts that could be made to Sdeesand_ hich actually di rove them in 1921, But this ne} eory is apparenuy 50 abstract that he could not think of a a phy- sical test for it. - Dr, Einstein himself was not present at the public announce- ment, which was made at the opening of the annual meeting of Advancement of Science. The Princeton University Press! , resented the paper. It is pub- g it in February as an added apter in Dr. Einstein's own , “The Meaning of Rela- ity.” “Dr. Einstein is now qiro- fessor of mathematics at the jInstitute for Advanced Study a! Princeton, & non-university group’ ‘for fundamental research. Explains His Aims. \ at the start of his paper, Dr. {Binstein explains his aim: “I ahall try to present an at- tempt at the solution of this. problem (the unified fleld theory),' ‘which appears to me highly con-' cing; although due to mathe: jatical difficulties I have not und & way to confront ts-of the theary with expert ‘Mhental evidence.” VOPR gun the American Association for the) tin forms of one overall force. In his general theory of 1915, Dr. Einstein showed by mathe- ;matics that gravitation and inertia ‘were equivalent. ‘This theory was Proved when astronomers were able to detect the sun’s gravity bending light from a distant star. x : In an earlier special theory of relativity in 1905, Dr. Einstein had shown that space and time, instead of being separate, were both parts of a “space-time con- uum.” As one result of the 1905 theory, Dr. Einstein wrote an equation ‘saying that matter could be con- ‘verted into energy—a Yantastic ‘mmount of energy. _ It seemed only a scientific cu- riosity until some matter—ur jum 235—was turned into energy years later over Hiroshima. No one knows what it will take! fleld that can act at a distance,| gen 80: et a Glavin___ rho Nich Rose ‘Trae: Mohr Fieteher v ‘ ° Tele. Room__ Nease Gandy, o FEB § IS5% _— —_~ Page prove Dr. Einstein's new theory, Times-Herald —_ Or how long * * * or where. Wash. Post —_ Wash. News —_ Wash. Star | N.Y. Mirror —— mC 27%.