Xtend ChemEd X

(e)Xtend ChemEd X looks outside the resources available at ChemEd X to items of interest to the community throughout the internet.

Xtend includes Picks, which includes a short description of books, articles, journals, magazines, and web items that our contributors and staff find interesting, professional development events, tweets, and news feeds.

by Hal Harris
Wed, 03/01/2000 - 00:00

For anyone who has tried unsuccessfully (like me) to find familiar stars in well-known constellations through a telescope, the competition that David Freedman describes sounds impossible. The "sport" is to see how many of the 110 celestial objects in the Messier catalog you can locate and identify during a single night of observation.

Recent activity: 11 months 1 day ago
by Hal Harris
Thu, 02/03/2000 - 02:00

I'm not a big fan of science fiction. I find "real" science to be generally more interesting; the fictionalized kind usually requires me to pretend that the universe is far different than what I believe to be the case. In fiction, travel between planets (or even solar systems) is accomplished quite easily, by suspension of the speed limit imposed by relativity.

Recent activity: 11 months 1 day ago
by Hal Harris
Wed, 02/02/2000 - 01:00

These authors address a few of the same questions as do Karukstis and Van Hecke, but they take aim at a somewhat more technically sophisticated audience; instead of trying to enhance chemical education near the introductory level, they are speaking to practicing chemists, some of whom may also be teachers.

Recent activity: 10 months 2 weeks ago
by Hal Harris
Tue, 02/01/2000 - 00:00

Kerry Karukstis and Gerry Van Hecke teach undergraduate chemistry at Harvey Mudd College (my alma mater), and Gerry was a student there at the same time I was (sometime in the previous millennium). They have collaborated on a very useful and engaging supplementary book for introductory and organic chemistry.

Recent activity: 10 months 2 weeks ago
by Hal Harris
Sun, 01/02/2000 - 01:00

Artist David Hockney has a theory that some of the "old master" portrait painters secretly used cameras(!) to help them sketch their subjects. No, he's not saying that they had Polaroids or film. However, the camera obscura was available in the early 18th century, and the more practical camera lucida was invented in 1807. Did the great artists use these devices?

Recent activity: 11 months 1 day ago
by Hal Harris
Sat, 01/01/2000 - 00:00

The date for this selection should be listed as January, 02000, in keeping with the long view of history, science, technology, and environment that the Long Now Foundation wants to foster.

Recent activity: 10 months 2 weeks ago
by Hal Harris
Wed, 12/01/1999 - 00:00

In about 1637, a French mathematical genius named Pierre de Fermat wrote in the margin of his copy of Arithmetica by Pythagorus, that he could prove that there were no solutions to the simple variation on Pythagorus' Theorem, az + bz = czwhen a, b, and c are integers and z is larger than two.

Recent activity: 10 months 2 weeks ago
by Hal Harris
Mon, 11/01/1999 - 00:00

Of course it is unreasonable to put together a list of the 100 most important books of the century. On the other hand, it is a lot of fun for a scientific bibliophile like me to think and argue about what ought to be on such a list.

Recent activity: 11 months 1 day ago
by Hal Harris
Fri, 10/01/1999 - 01:00

I bought "Faster" because of talent the author had shown for rendering extremely complicated science for the interested layperson. "Chaos", published in 1987 was a wonderful book, and Gleick's next one, "Genius: The Life and Times of Richard Feynman", also won a National Book Award. (I haven't read that one, however.) "Faster" is a good book, but was nevertheless something of a disappointment.

Recent activity: 10 months 2 weeks ago
by Hal Harris
Thu, 09/02/1999 - 02:00

Dava Sobel describes the correspondence to Galileo Galilei from his daughter, Virginia, who was a nun in the Convent of San Matteo, near Florence. Virginia, who took the religious name Maria Celeste, was a kind of apothecary in her convent, and she did her best to provide elixirs and pills to protect Galileo from the plague, along with weekly letters of news and encouragement.

Recent activity: 11 months 1 day ago