Since the 1920s this discrepancy has been explained by the presence of isotopes ; the atomic mass of any isotope is very close to satisfying the whole number rule, with the mass defect caused by differing binding energies being significantly smaller.

Since the 1920s, Oxford has been the most popular candidate among " anti-Stratfordians ," a collective term for adherents of the various alternative-authorship theories.

Since the 1920s, Prime Ministers have typically been conferred the Grand Cordon of the Order of the Rising Sun, or the Grand Cordon of the Order of the Paulownia Flowers ( until 2003 a special higher class of the Order of the Rising Sun ), depending on tenure and eminence.

Since the production of high-quality semiconductor materials was still decades away, Lilienfeld's solid-state amplifier ideas would not have found practical use in the 1920s and 1930s, even if such a device were built.

Since the 1920s, it has experienced rapid growth and established many industries for agricultural products and machinery, textiles, pharmaceuticals, metal products, and services.

Since the 1920s, the two largest political parties have been the Conservative Party and the Labour Party.

Since the 1920s, X-ray diffraction has been the principal method for determining the arrangement of atoms in minerals and metals.

Since the end of the 20th century, the economic strength during the 1920s has drawn close comparison with the 1950s and 1990s, especially in the United States of America.

Since the 1920s, the appearance of the " modern girl " ( moga ) and " modern boy " ( mobo ) saw an increase in the number of women taking on the role of industrial and white-collar workers and consumers.

Since the 1960s Leiston became famous outside the UK as the home of the Summerhill School, founded by A. S. Neill in the 1920s, which was the first major " free school "-referring to freedom in education.

Since the district's period of significance extends to 1944, most of those buildings erected after the 1920s were built as infill within the areas already subdivided by the 1920s.

Since the district's period of significance extends to 1944, most of those buildings erected after the 1920s were built as infill within the areas already subdivided by the 1920s.

Since the early 1920s, 150 movies and about a dozen television shows have been filmed here, including Tom Mix films, Hopalong Cassidy films, The Gene Autry Show, and The Lone Ranger.

Since the 1920s, the economy has been based primarily on agriculture.

Since the 1920s, an increasingly elaborate sub-culture of organized science fiction fandom has arisen, initially among correspondents to the letter columns of science fiction magazines.

Since the 1920s, Governors-General have acted solely on the advice of the local ministers, rather than on that of the British Government.

Since the 1920s the Wallabies have worn green and gold jerseys.

Since the late 1920s the tension between the air and naval services had declined.

Since the 1920s, the street's name has been synonymous with the American advertising industry.

Since the early 1920s, this modern vernacular form has been the standard style of writing for speakers of all varieties of Chinese throughout mainland China, Taiwan, Malaysia and Singapore as the written form of Modern Standard Chinese.

Since late 1920s, nearly all Chinese newspapers, books, and official and legal documents have been written in vernacular Chinese using the national standard.

Since the 1920s, 1.

Since 2006, Lancaster Library has hosted a regular series of music events under the Get it Loud in Libraries initiative.

Since it is extensive from near the Schuylkill River in the NE to the Lancaster County border in the SW, its terrain varies considerably.

Since then, as the Industrial Revolution came to a close, Lancaster Township has been transformed into a mostly residential municipality.

Since 1962. the district has had a partnership with Lancaster County, Pennsylvania.

Since November 2010, Clarke has also been Visiting Professor of Politics and Faith in the Department of Politics, Philosophy and Religion at Lancaster University.

Since the late 1990s, the Conestoga has undergone extensive reconstruction between Courtland Avenue and Lancaster Street, with the addition of an Ontario " tall-wall " concrete median barrier and high-mast lighting replacing the conventional mercury truss lights.

Since his party came to power in 1997, he has served as PPS to Dr David Clark as Chancellor of the Duchy of Lancaster 1997-8 and to Baroness Jay of Paddington as Lord Privy Seal, Leader of the Lords and Minister for Women 1998-2001.

Ophthalmologist Walter B. Lancaster had this to say: " Since seeing is only partly a matter of the image on the retina and the sensation it produces, but is in still larger part a matter of the cerebral processes of synthesis, in which memories play a principal role, it follows that by repetition, by practice, by exercises, one builds up a substratum of memories useful for the interpretation of sensations and facilitates the syntheses which are the major part of seeing.

Since the 1990s he is Professor Emeritus of Systems in Lancaster University Management School.

Since 1 August 1649, Bradshaw had also held the post of Chancellor of the Duchy of Lancaster.

Since the season, he has managed in the minors for the Lancaster JetHawks ( 1997 -), San Bernardino Stampede (), San Antonio Missions (), Billings Mustangs (-) and Louisville Bats (-), before returning to Billings for two seasons (-).

Since then, and since the pure grain had gotten him divorced from every decent -- and even indecent -- group from Greenwich Village to the Embarcadero, he had become a sucker-rolling freight-jumper.

Since appeals to morality, to humanity, and to sanity have had such small effect, perhaps our last recourse is the deterrent example.

Since his seizure, Scotty had had little appetite ; ;

Since Mr. McKinley had to give a lecture, Rachel and Scotty drove home alone in the Plymouth.

Since she could not act, one part suited her as well as any other, and so she was the first person to offer Mr. Lincoln a glass of water, holding it up to the box, high above her head, to Miss Harris, who had asked for it.

Since the Santo Spirito hospital had taken only men, he had had no experience in the study of female anatomy ; ;

Since then, the flowers she had planted had spread all over the hill.

Since he had gross income of $600 or more, he must file a return in which he may claim an exemption deduction of $600.

Since the writer had established this democratic procedure in the beginning he had to go along with their decision -- after, of course, pointing out whether he thought their decision was a wise or an unwise one.

Since the writer had not noticed this characteristic in married students scattered throughout the various sections previous to this experiment, nor, as a matter of fact, in those who were continuing in `` single sections '', he can only conclude that there must have been something `` contagious '' within the specific group which caused this to occur.

Since the details of the elections were settled the change of government had no direct effect on the technical aspects of the elections, and may have been more important as an indication of royal displeasure with the U.N.F.P.

Since the strength of the Mexicans had been underrated, too small a posse had been collected, and since the deputy had not been provided with search warrants, MacPherson and his men decided it was much wiser to withdraw.

Since the magnitude of the plan made secrecy impossible, once the wheels had began to turn, persons controlling German industries, social institutions, and armed forces became, through their anti-Semitism or their tolerance of it, conscious accomplices of Hitler's crimes ; ;

Since Mrs. Calhoun remembered only that the marriage had been in the spring, he started to plod through several months.

Since then he had worked at this and that, though some said his main interest was gambling.

Since Election Day, Vice President Richard Nixon had virtually retired -- by his own wish -- from public view.

Since he possessed more power in an interdependent universe of living beings and dead spirits, the emperor had to use it for the benefit of the living.