Thursday, May 28, 2009
Books for Boys in Secondary Schools in England
Wednesday, May 27, 2009
Acid Rain
Acid rain is a uniquely human-related phenomenon. The burning of fossil fuels (coal and oil) by power-production companies and industries releases sulfur into the air that combines with oxygen to form sulfur dioxide (SO2). Exhausts from cars cause the formation of nitrogen oxides in the air. From these gases, airborne sulfuric acid (H2SO4) and nitric acid (HNO3) can be formed and be dissolved in the water vapor in the air. Although acid-rain gases may originate in urban areas, they are often carried for hundreds of miles in the atmosphere by winds into rural areas. That is why forests and lakes in the countryside can be harmed by acid rain that originates in cities.
The environment can generally adapt to a certain amount of acid rain. Often soil is slightly basic (due to naturally occurring limestone, which has a pH of greater than 7). Because bases counteract acids, these soils tend to balance out some of the acid rain's acidity. But in areas, such as some of the Rocky Mountains and parts of the northwestern and southeastern United States, where limestone does not naturally occur in the soil, acid rain can harm the environment.
Some fish and animals, such as frogs, have a hard time adapting to and reproducing in an acidic environment. Many plants, such as evergreen trees, are damaged by acid rain and acid fog. I've seen some of the acid-rain damage to the evergreen forests in the Black Forest of Germany. Much of the Black Forest was indeed black because so much of the green pine needles had been destroyed, leaving only the black trunks and limbs! You also might notice how acid rain has eaten away the stone in some cities' buildings and stone artwork.
When you hear or read in the media about the effects of acid rain, you are usually told about the lakes, fish, and trees in New England and Canada. However, we are becoming aware of an additional concern: many of our historic buildings and monuments are located in the areas of highest acidity. In Europe, where buildings are much older and pollution levels have been ten times greater than in the United States, there is a growing awareness that pollution and acid rain are accelerating the deterioration of buildings and monuments.
Stone weathers (deteriorates) as part of the normal geologic cycle through natural chemical, physical, and biological processes when it is exposed to the environment. This weathering process, over hundreds of millions of years, turned the Appalachian Mountains from towering peaks as high as the Rockies to the rounded knobs we see today. Our concern is that air pollution, particularly in urban areas, may be accelerating the normal, natural rate of stone deterioration, so that we may prematurely lose buildings and sculptures of historic or cultural value.
Tuesday, May 26, 2009
Teddy bear History
The name Teddy Bear comes from the November 1902 American President Theodore Roosevelt's hunting trip to Mississippi, to which he was invited by Mississippi Governor Andrew H. Longino. There were several other hunters competing, and most of them had already shot something. A suite of Roosevelt's attendants, led by Holt Collier, cornered, clubbed, and tied an American Black Bear to a willow tree after a long exhausting chase with hounds. They called Roosevelt to the site and suggested that he should shoot it. He refused to shoot the bear himself, deeming this unsportsmanlike, but instructed that the bear be killed to put it out of its misery, and it became the topic of a political cartoon by Clifford Berryman in The Washington Post on November 16, 1902. While the initial cartoon of an adult black bear lassoed by a white handler and a disgusted Roosevelt had symbolic overtones, later issues of that and other Berryman cartoons made the bear smaller and cuter.
Morris Michtom saw the drawing of Roosevelt and the bear cub and was inspired to create a new toy. He created a little stuffed bear cub and put it in his shop window with a sign that read "Teddy's bear," after sending the bear to Roosevelt and receiving permission to sell the bears. The toys were an immediate success and Michtom founded the Ideal Novelty and Toy Co., which still exists today.
At the same time, in Germany the Steiff firm, unaware of Michtom's bear, produced a stuffed bear from Richard Steiff's designs. They exhibited the toy at the Leipzig Toy Fair in March 1903 and exported 3000 to the United States.
By 1906 manufacturers other than Michtom and Steiff had joined in and the craze for Teddy Bears was such that ladies carried them everywhere, children were photographed with them, and Roosevelt used one as a mascot in his bid for re-election.
American educator Seymour Eaton wrote the children's book series The Roosevelt Bears, while composer John Bratton wrote "The Teddy Bear Two Step" which, with the addition of Jimmy Kennedy's lyrics, became the song "The Teddy Bears' Picnic".