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2 Basic to any understanding of Canada in the 20 years after the Second World War is the country’s impressive population growth.
3 Undoubtedly, the good economic conditions of the 1950’s supported a growth in the population, but the expansion also derived from a trend toward earlier marriages and an increase in the average size of families.
4 Although most of these claims are not supported by scientific evidence, the preponderance of written material advancing such claims makes it difficult for the general public to separate fact from fiction.
5 The desperate plight of the South has eclipsed the fact that construction had to be undertaken also in the North, though less spectacularly.
6 The new accessibility of land around the periphery of almost every major city sparked an explosion of real estate development and fueled what we now know as urban sprawl.
7 Accustomed though we are to speaking of the films make before 1927 as “silent”, the film has never been, in the full sense of the world, silent.
8 Coincident with concerns about the accelerating loss of species and habitats has been a growing appreciation of the importance of biological diversity the number of species in a particular ecosystem, to the health of the Earth and human well-being.
9 Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house.
10 Aside from perpetuating itself, the solo purpose of the American Academy and Institute of Arts and Letters is to “foster, assist and sustain an interest” in literature, music and art.
11 The intimacy of marriage that was common in earlier periods was rent, and a gulf that at times seemed unbridgeable was created between husbands and wives.
12 one of the most important social developments that helped to make possible a shift in thinking about the role of public education was the effect of the baby boom of the 1950’s and 1960’s on the schools.
13 Although economics was probably the most important determinant, it is not the only explanation for the baby boom. The increased value placed on the idea of the family also helps to explain this rise in birth rates.
14 The baby boomers began streaming into the first grade by the 1940 and became a flood by 1950.
15 The railroad could be and was a despoiler of nature, furthermore, in its manifestation of speed and noise, it might be a despoiler of human nature as well.
16 The main advantages of low pressure engines were safe operation and economy of fuel consumption, neither of which means much in the West.
17 The confusion and congestion of individual citizens looking for their letters was itself enough to discourage use of the mail.
18 Sectional jealousies and constitutional scruples stood in the way of action by the federal government, and necessary expenditures were too great for private enterprise.
19 Its goals were the facilitation of western settlement and the development of native industries. Life’s transition from the sea to land was perhaps as much of an evolutionary challenge as was the genesis of life.
20 In 1839 the daguerreotype was introduced t America, ushering in the age of photography and within a generation the new invention put an end to the popularity of painted portraits.
21 The development of the railroad and telegraph systems during the middle third of the nineteenth century led to significant improvements in the speed, volume, and regularity of shipment and communications, make possible a fundamental transformation in the production and distribution of goods.
22 Congressman Sam Rayburn’s 25 consecutive terms in the House of Representatives marked one of the longest tenures of any representative in United States history.
23 Roller-skating, a sport that has an obscure origin, is popular among children worldwide.
24 The amount of time spent watching television in the average household in the United States has risen steadily since television sets were introduced in the 1950’s.
25 The significance of magazines among contemporary media is sometimes grossly underestimated because of television’s seeming dominance.