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

By the Naturalisation Act 1870, it was made possible for British subjects to renounce their nationality and allegiance, and the ways in which that nationality is lost are defined.

But By the Way was one of the few features kept continuously running in the often seriously reduced Daily Express throughout World War II, when Morton's lampooning of Hitler, including the British invention of bracerot to make the Nazi's trousers fall down at inopportune moments, was regarded as valuable for morale.

By 16: 00, Alexander and Swiftsure were also in sight, although some distance from the main British fleet, and Brueys gave orders to abandon the plan to remain at anchor and instead for his line to set sails, although Blanquet protested the order on the grounds that there were not enough men aboard the French ships to both sail the ships and man the guns.

By 18: 00, the British fleet was again under full sail, Vanguard sixth in the line of ten ships as Culloden trailed behind to the north, and Alexander and Swiftsure hastened to catch up to the west.

By 24: 00 only Tonnant remained engaged, as Commodore Aristide Aubert Du Petit Thouars continued his fight with Majestic and fired on Swiftsure when the British ship moved within range.

By contrast, the British press were jubilant ; many newspapers sought to portray the battle as a victory for Britain over anarchy, and the success was used to attack the supposedly pro-republican Whig politicians Charles James Fox and Richard Brinsley Sheridan.

By resigning Laws became the shortest serving Minister in modern British political history with less than 18 days service as a Cabinet Minister.

By the last years of the 19th century, The British Museum's collections had increased so much that the Museum building was no longer big enough for them.

By the mid-1950s the system was being used in at least sixty British libraries and in a hundred by the 1970s.

By 1888, over 3, 000 British public houses, grocers and chemists were selling Bovril.

By the end of 1971, 29 barricades were in place to prevent access to what was known as Free Derry, 16 of them impassable even to the British Army's one-ton armoured vehicles.

By the time the inquiry had retired to write up its findings, it had interviewed over 900 witnesses, over seven years, making it the biggest investigation in British legal history.

By 1951 about 20 % of the British economy had been taken into public ownership.

By the 1870s, British physicist William Crookes and others were able to evacuate tubes to a lower pressure, below 10 < sup >− 6 </ sup > atm.

By the mid-19th century, however, the powerful British Empire gave up mercantilism and trade restrictions and introduced the principle of free trade, with few restrictions or tariffs.

By comparison, the former colony of the United Province of Canada ( divided into the District of Canada East, and the District of Canada West ) and the western provinces were dozens of times larger and in some cases were expanded to take in territory formerly held in British Crown grants to companies such as the Hudson's Bay Company ; in particular the November 19, 1869 sale of Rupert's Land to the Government of Canada under the Rupert's Land Act 1868 was facilitated in part by Maritime taxpayers.

By the late 1970s, two and a half million British homes received their television service via cable.

By the end of the summer however, the plan had changed ; now the British alone would impose the pliant Shuja Shah.

By 1854 the British wanted to resume relations with Dost Mohammad, whom they had essentially ignored in the intervening twelve years.

By the time Sher Ali had established control in Kabul in 1868, he found the British ready to support his regime with arms and funds, but nothing more.

By the end of October, Allen was again off New York, where the British, having secured the city, moved the prisoners on-shore, and, as he was considered an officer, gave Allen limited parole.

By 1949, the United States and British intelligence organizations were working with King Zog and the mountain men of his personal guard.

By the end of the week, British strength stood at over 16, 000 men.

By the end of the week, the British had taken some of the buildings in the Union, but others remained in rebel hands.

By the time British reinforcements arrived in the west, the rising there had already disintegrated.