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Hal Harris's picture

The Myth of Scientific Literacy

Sat, 06/01/1996 - 01:00 -- Hal Harris

If you are among the many high school and college chemistry teachers who have adopted the American Chemical Society's curricula, Chemistry in Context for college students or Chemistry in the Community (ChemCom) in secondary school, you will find that Morris Shamos will challenge the very basis of what you are trying to do, as well as the whole idea of "scientific literacy".

Hal Harris's picture

Digital Diffraction

Mon, 04/01/1996 - 00:00 -- Hal Harris

I've always thought that optical transforms were a great model for the determination of crystal structures using X-ray diffraction, and I've used the ICE (Institute for Chemical Education) kit for this exercise many times.

Hal Harris's picture

James Dewar, His Flask and Other Achievements

Fri, 03/01/1996 - 00:00 -- Hal Harris

The Dewar flasks that we use for storage of cryogenic fluids such as liquid nitrogen, oxygen, and helium, and which known outside the laboratory as "thermos bottles" were invented by James Dewar, who was the first person to liquefy hydrogen, and was nearly first in the nineteenth century races to liquefy all of the other gases.

Hal Harris's picture

The National Science Education Standards

Thu, 02/01/1996 - 00:00 -- Hal Harris

Well, the final version of the National Science Education Standards has finally arrived. If you are involved in curriculum planning for your school or district, or if you want to study the document in detail, you can buy a copy for $19.95 + 4.00 shipping from the National Academy Press, 2101 Constitution Avenue, NW, Lockbox 285, Washington DC 20055 [1-800-624-6242].

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Silent Sperm

Wed, 01/03/1996 - 02:00 -- Hal Harris

In the novel "The Children of Men" by P. D. James, set in the year 2021, mankind is faced with extinction due to the worldwide sterility of human males. Is there a basis for fear that this is actually happening? Or is the reported decline in sperm counts, over the past half-century, even a fact?