By the 1920s, each state in the United States had passed public laws that stipulated a certain day to be Arbor Day or Arbor and Bird Day observance.

By the late 1920s Potter and her Hill Top farm manager Tom Storey had made a name for their prize-winning Herdwick flock.

By the 1920s, composers of Tin Pan Alley and Broadway used ballad to signify a slow, sentimental tune or love song, often written in a fairly standardized form ( see below ).

By the late 1920s, New York writers other than Fitz Gerald were starting to use " Big Apple " and were using it outside of a horse-racing context.

By the 1920s, the emerging middle and working classes were powerful enough to elect a reformist president, Arturo Alessandri Palma.

By the 1920s, many newspapers had a comics page on which many strips were collected together.

Additional milieu were provided by Chaosium with the release of Dreamlands, a boxed supplement containing additional rules needed for playing within the Lovecraft Dreamlands, a large map and a scenario booklet, and Cthulhu By Gaslight, another boxed set which moved the action from the 1920s to the 1890s.

By the early 1920s, unit operations became an important aspect of chemical engineering at MIT and other US universities, as well as at Imperial College London.

By the late 1920s, Al Capone and the Mob were inspiring not only fear, but piquing mainstream curiosity about the American underworld.

By the 1920s, the U. S. reached what is still its era of greatest-ever output, producing an average of 800 feature films annually, or 82 % of the global total ( Eyman, 1997 ).

By the 1920s Lewis Fry Richardson's interest in weather prediction led him to propose human computers and numerical analysis to model the weather ; to this day, the most powerful computers on Earth are needed to adequately model its weather using the Navier – Stokes equations.

By the 1920s, the idea of an Israelite conquest of Canaan-the story of the book of Joshua-was not supported by the archaeological record.

By the 1920s, Hearst, was the owner of a chain of newspapers from coast to coast.

By the 1920s, the diatonic harmonica had largely reached its modern form.

By the 1920s however the Senate had lost much of its original influence, and hence no sitting senator had been known to have serious aspirations of becoming prime minister whilst remaining in the Senate.

By the 1920s the number of cars had soared to 60, 000.

By the early 1920s, however, the inherent limitations of this type of engine had rendered it obsolete, with the power output increasingly going into overcoming the air-resistance of the spinning engine itself.

By the 1920s psychoanalysts assumed that homosexuality was pathological and that attempts to treat it were appropriate, although psychoanalytic opinion about changing homosexuality was largely pessimistic.

By the late 1920s the resistance movement against colonial rule had gathered widespread support during the mistreatment of the Samoan people by the New Zealand administration.

By the late 1920s, however, those employing only optical and electronic technologies were being explored.

By the late 1920s, economic performance had stabilised, but the overall situation was disappointing, for Britain had clearly fallen behind the United States and other countries as an industrial power.

By the 1920s, however, this boisterous folksiness had diminished.

By the end of the 1920s Corbusier was already an internationally known architect.

By the 1920s, the British Government were seeking a replacement for their book code systems, which had been shown to be insecure, and which proved to be slow and awkward to use in practice.

" By the 1920s, Birmingham was the 19th largest city in the U. S and held more than 30 % of the population of the state.

By specifying Catholic doctrine on salvation, the sacraments, and the Biblical canon, the Council was answering Protestant disputes.

By the time of the Protestant Reformation, Protestant theologians began to embrace the term evangelical as referring to " gospel truth ".

By now Glasnevin was an area for families of distinction-in spite of a comment attributed to the Protestant Archbishop King of Dublin that " when any couple had a mind to be wicked, they would retire to Glasnevin ".

By 1700, the Protestant monarchy seemed in danger of coming to an end with the childless Stuart Princess Anne.

By the middle of the 17th century, plays such as Robert Davenport's King John and Matilda, although based largely on the earlier Elizabethan works, were transferring the role of Protestant champion to the barons and focusing more on the tyrannical aspects of John's behaviour.

By the first half of the 18th century, the Authorized Version was effectively unchallenged as the English translation used in Anglican and Protestant churches.

By 1688, nearly all of Martinique's French Protestant population had escaped to the British American colonies or Protestant countries back home.

By the time of the Protestant Reformation, with the separation of Church and State, in the most progressive countries, the State succeeded in dealing with the business of administering justice.

By the time Henry conducted another Protestant marriage with his final wife Catherine Parr in 1543, the old Roman Catholic advisers, including the powerful third Duke of Norfolk had lost all their power and influence.

" By the end of the 16th century, however, patronage was split among many areas: the Catholic Church, Protestant churches and courts, wealthy amateurs, and music printing — all were sources of income for composers.

By winning the West Virginia primary, Kennedy was able to overcome the belief that Protestant voters would not elect a Catholic candidate to the Presidency and thus sewed up the Democratic nomination for President.

By the time of the Protestant Reformation in the 16th century, Strasbourg was a prosperous community, and its inhabitants accepted Protestantism in 1523.

By the 17th century, Canterbury's population was 5, 000 ; of whom 2, 000 were French-speaking Protestant Huguenots, who had begun fleeing persecution and war in the Spanish Netherlands in the mid-16th century.

By the peace of Montpellier in 1622, concluding a Huguenot revolt in Languedoc, the fortified Protestant towns were reduced to two, La Rochelle and Montauban.

By 1580 the Protestant Reformation in Utrecht and surrounding regions rendered impossible several attempts to effectively continue the ecclesiastical archdiocese, after the death of archbishop Frederik V Schenck van Toutenburg.

By 1911 it had two Protestant and four Roman Catholic churches, a synagogue, a mining school, a convent, a hospital, two orphanages, and a barracks.

By comparison with the forcible closure of monasteries elsewhere in Protestant Europe, the English and Welsh dissolutions resulted in a relatively modest volume of new educational endowments ; but the treatment of former monks and nuns was more generous, and there was no counterpart elsewhere to the efficient mechanisms established in England to maintain pension payments over successive decades.

By about 3 PM, the Protestant second-in-command Bernhard of Saxe-Weimar, having learned of the king's death, returned from the left wing and assumed command over the entire army.

By 1574 the previously Catholic parish church of Saint Lambert () had already become Calvinist Reformed Protestant.

By the Peace of Montpellier in 1622, the fortified Protestant towns were reduced to two: La Rochelle and Montauban.

By the early 1630s Frederick had built a close relationship with the Swedish King Gustavus, the dominant Protestant leader in Germany.

By mid-century, in the tense atmosphere of wars of religion in Germany and France, both Protestant and Catholic authorities reasoned that only control of the press, including a catalog of prohibited works, coordinated by ecclesial and governmental authorities could prevent the spread of heresy.

By the 1800s resentment grew as not only were the absentee landlords Protestant ( while most tenants were Catholic and forbidden to own land ), but their existence meant that the wealth of the land was always exported.