Computer and projected stereo images require convergent (cross - eye)
viewing — that is, looking at the left - hand image with the right eye and the
right - hand image with the left eye. Gaze at a projected stereo pair with your
head level. Cross your eyes slightly and slowly so that the two center images
(of the four you see) come together. When they fuse, you will see them as a
single 3 - D image. Ignore the other images at the periphery of your vision.
Another approach: With your head level and about 2.5 feet from the computer
screen, hold up a fi nger, with its tip about 6 inches from your face, centered
between the stereo pair on the screen. Focus on your fi nger tip. If you see four
images, move your fi nger slowly back and forth until the middle images con-
verge, then change your focus to the screen. Try removing the fi nger.
Texts and journal articles require divergent viewing — that is, viewing the
left - hand image with the left eye and right - hand image with the right eye. Put
your nose on the page between the two views. With both eyes open the two
images should be superimposed, but blurred. Slowly move the paper away
from your face, trying to keep the images superimposed until you can focus
on them. At this point, the middle image should appear three - dimensional and
the two peripheral ones should be ignored. Another technique suggests that
you tape a divergent stereopair to a mirror, just below eye level. Look at your
eyes in the mirror above the image then bend your knees so that your view
passes through the stereo pair on the way to looking at your eyes below the
image. Rise, then repeat. At some point, the images should fuse. If not, consider
the practice a good leg - strengthening exercise. Practice with any or all of the
techniques helps.
4.6.2 Online Societies, Online Literature Searching, and Materials and
Equipment Websites
The American Chemical Society maintains the chemistry.org website at http://
acswebcontent.acs.org/home.html. One can access Chemical Abstracts (CAS)
from this site. The site lists meetings, publications, and includes a careers and
jobs site and an online store. American Chemical Society (ACS) publications
at http://pubs.acs.org provides its members information products and services.
Currently, 35 peer - reviewed journals are published or co - published by the
Publications Division.
The website http://www.annualreviews.org/ offers online searching capabil-
ity to the entire Annual Reviews series. Annual Reviews publishes authorita-
tive, analytic reviews in 32 focused disciplines within the Biomedical, Physical,
and Social Sciences. The Annual Reviews of Biochemistry and Annual Reviews
of Biophysics and Biomolecular Structure are of most pertinence to bioinor-
ganic chemists. This nonprofi t, by - subscription, scientifi c publisher provides
free searching of the site and no - cost abstract retrieval.
The Library of Congress site at http://catalog.loc.gov/ provides free search-
ing access to the Library of Congress ’ huge collection of books and journals.
Some journal articles are available online.
WORLD WIDE WEB ONLINE RESOURCES 183