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.

Whenever any result is sought by its aid, the question will then arise — By what course of calculation can these results be arrived at by the machine in the shortest time?

By treating each candidate as a separate question, " Do you approve of this person for the job?

By design, CITES regulates and monitors trade in the manner of a " negative list " such that trade in all species is permitted and unregulated unless the species in question appears on the Appendices or looks very much like one of those taxa.

By non-constructive Davis means that " a proof that there actually are mathematic entities satisfying certain conditions would have to provide a method to exhibit explicitly the entities in question.

By Robert Graves's definition, a religion's traditional stories are " myths " if and only if one does not belong to the religion in question.

It is for them alone to point out what we ought to do … By the principle of utility is meant that principle which approves or disapproves of every action whatsoever according to the tendency it appears to have to augment or diminish the happiness of the party whose interest is in question: or, what is the same thing in other words to promote or to oppose that happiness.

By 1844, the Whigs began their recovery by nominating Henry Clay, who lost to Democrat James K. Polk in a closely contested race, with Polk's policy of western expansion ( particularly the annexation of Texas ) and free trade triumphing over Clay's protectionism and caution over the Texas question.

According to a story reported by Simplicius, Plato posed a question for Greek astronomers: " By the assumption of what uniform and orderly motions can the apparent motions of the planets be accounted for?

By abuse of language, a bare instrumentalist description could be referred to as an interpretation, although this usage is somewhat misleading since instrumentalism explicitly avoids any explanatory role ; that is, it does not attempt to answer the question why.

By contrasting the ease and freedom enjoyed by Samoan teenagers, Mead called into question claims that the stress and rebelliousness that characterize American adolescence is natural and inevitable.

By calling into question the legitimacy of Tel Aviv, they are supporting a one-state solution, which means the destruction of the State of Israel.

By 1035 the Byzantines had pushed the Arabs out of Asia Minor, and Harald took part in campaigns that went as far east as the Euphrates, where according to the skald Þjóðólfr Arnórsson ( recounted in the sagas ) he participated in the capture of eighty Arab strongholds, a number which historians Sigfus Blöndal and Benedikt Benedikz see no particular reason to question.

By Wednesday September 7, 1864, the delegates from Nova Scotia, New Brunswick and Prince Edward Island gave a positive answer to the Canadian delegation, expressing the view that the federation of all of the provinces was considered desirable if the terms of union could be made satisfactory and the question of Maritime Union was waived.

By the end of the decade, however, Philip's government was faced with the question of whether to prioritise the war in Flanders or Spain's relationship with France during the War of the Mantuan Succession ( 1628 – 31 ).

By excluding the German-speaking part of the multinational Austrian Empire, this geographic construction represented a German question | little Germany solution.

By 1924, the remaining unanswered question was how Fall had become so rich so quickly.

By the Sand River Convention, independence had been granted to the Boers living " north of the Vaal ", and the dispute turned on the question as to what stream constituted the true upper course of that river.

By the time of the Second Session of the Council in 1963 reservations began to be raised by bishops of the Middle East about the inclusion of this question.

( The story in question was probably " By the Waters of Babylon " by Stephen Vincent Benét, which was published as " The Place of the Gods " in the July 31, 1937 edition.

By blaming witches, religious authorities provided a handy scapegoat for those who might otherwise question God's goodness.

By asking one yes / no question, can you determine the road to Freedom?

By limiting the rate that email can be sent around what is typical for the computer in question, legitimate email can still be sent, but large spam runs can be slowed down until manual investigation can be done.

By the early 1990s Aftonbladet had run into economic problems, and many had begun to question the competence of the trade union movement as a media owner.

By the time a civilian government returned to office in 1986, the URNG recognized that coming to power through armed struggle was out of the question, and they took initiatives to negotiate a political solution.