205. (T-9-Q15) The commission’s office of compliance, inspections, and investigations plans to intensify its scrutiny of stock analysts to investigate not only whether research is an independent function at brokerage firms, but also whether conflicts result when analysts own the stocks they write about or when they are paid for their work by a firm’s investment banking division.
196. (GWD-1-Q41) Leaching, the recovery of copper from the drainage water of mines, was a well-established method of mineral extraction as early as the eighteenth century, but until about 25 years ago miners did not realize that bacteria take an active part in the process.
225. (GWD-3-Q39) Minivans carry as many as seven passengers, and compared with sport utility vehicles, most cost less, get better gas mileage, allow passengers to get in and out more easily, and have a smoother, more car-like ride.
175. Experts estimate that ten times as much petroleum exists in such sources as tar sands, heavy oil, and perhaps even shale as conventional reservoirs.
204. (T-9-Q16) The nineteenth-century chemist Humphry Davy presented the results of his early experiments in his “Essay on Heat and Light,” a critique of all chemistry since Robert Boyle as well as a vision of a new chemistry that Davy hoped to found.
179. Unlike the independent candidacies of George Wallace in 1968 and John Anderson in 1980, H. Ross Perot's independent run for the presidency in 1992 arose not from an unsuccessful effort to gain a major party nomination but from a desire to establish a viable third party in American politics.
195. (GWD-7-Q13) Like the grassy fields and old pastures that the upland sandpiper needs for feeding and nesting when it returns in May after wintering in the Argentine Pampas, the bird itself is vanishing in the northeastern United States as a result of residential and industrial development and of changes in farming practices.
207. (T-4-Q30) Unlike the shuttle and earlier spacecraft, which were capable of carrying sufficient power in fuel cells and batteries for their short flights, a permanently orbiting space station will have to generate its own electricity.
213. (GWD-3-Q34) Shoppers in sporting goods stores, unlike those in department stores, do very little impulse shopping; someone who comes in for a basketball will leave with a basketball only and not buy a pair of skis and a boomerang as well.
152. Unlike Schoenberg, whose twelve-tone system dominated the music of the postwar period, Bartk founded no school and left behind only a handful of disciples.
171. One of the primary distinctions between our intelligence and that of other primates may lie not so much in any specific skill as in our ability to extend knowledge gained in one context to new and different ones.
172. Introduced by Italian merchants resident in London during the sixteenth century, life insurance in England remained until the end of the seventeenth century a specialized contract between individual underwriters and their clients, typically ship owners, overseas merchants, or professional moneylenders.
237. (GWD-8-Q16: GWD-13-15) Concerns about public health led to the construction between 1876 and 1904 of three separate sewer systems to serve metropolitan Boston.
248. (GWD-9-Q32) The United States minted about 857 million silver-colored “Susan B. Anthony” dollars between 1979 and 1981, but the coin proved unpopular because it looked and felt too much like a quarter.
256. (T-4-Q1 TS-7-41) Scientists have dated sharp-edged flakes of stone found in the fine-grained sediments of a dry riverbed in the Afar region of Ethiopia to between 2.52 and 2.60 million years ago, pushing back by more than 150,000 years the earliest date at which humans are known to have made stone tools.
157. The striking differences between the semantic organization of Native American languages and that of European languages, in both grammar and vocabulary, have led scholars to think about the degree to which differences in language may be correlated with nonlinguistic differences.
198. (GWD-18-Q31) Between 1990 and 2000 the global economy grew more than it did during the 10,000 years from the beginning of agriculture to 1950.