On Page 651 (the journal issue starts on page 594) of the July 2003 The
Leading Edge (TLE--a trade journal for exploration geophysics) there is an
ad for Tricon Geophysics, Inc. (www.tricongeophysics.com) The ad features a
Mannheim-style wooden slide rule, well worn and rather nice looking for
that. Overlaid on the cursor is an image of that famous Japanese woodcut of
a tsunami, overlaid with the logo for the Tsunami imaging suite.

Awhile back the subject of sliderules in geophysics popped up, with Brian
Borchers mentioning a normal moveout or seismic velocity slide rule designed
by Carl Savit, late of Western Geophysical (now WesternGeco, after a
merger). I did inquire about this with the author af an article that Brian
had cited, with my (now former) employer, but never found anything,
unfortunately. Maybe I'll track something down one of these days.

A good weekend to all,
Jim



James Stephens, PhD
14220 Park Row 436
Houston TX 77084
281-920-4580 (home)

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