In the second paragraph it says: "For instance, one emerald mine established in 1981 in Santa Terezinha, Brazil, produced a peak of 25 tons of rough stones valued at $9 million in 1988; the same tonnage of stones mined in 2000 sold for only $898,000." If I took that sentence seriously, I would have to infer that the price dropped by an order of magnitude, presumably because other productive mines had been opened. But the preceding sentences says the contrary: "Thus high-quality gems can be mined out much faster than they are produced, essentially making them a finite resource." "The same tonnage" must be wrong. Please clarify.
posted by Joseph Fineman
February 20, 2012
JSTOR, the online academic archive, contains complete back issues of American Scientist from 1913 (known then as the Sigma Xi Quarterly) through 2005.
The table of contents for each issue is freely available to all users; those with institutional access can read each complete issue.
View the full collection here.
An early peek at each new issue, with descriptions of feature articles, columns, and more. Every other issue contains links to everything in the latest issue's table of contents.News of book reviews published in American Scientist and around the web, as well as other noteworthy happenings in the world of science books.
To sign up for automatic emails of the American Scientist Update and Scientists' Nightstand issues, create an online profile, then sign up in the My AmSci area.