Don wrote:
  Hi,
 I spent a few hours last night playing with different
 scanning options and figured I would share my observations. 
  Bottom line:  the 100KB B&W TIFF was much better
looking
 than even the 530KB JPEG.  And the 250KB B&W TIFF was so
 "fine" that I suspect it is overkill (I doubt anyone or
 anyTHING -- i.e. software -- could discriminate between
 that at 800dpi and the 400dpi version).
 So, to answer *my* initial question (ages ago), 400dpi C4 TIFFs
 are definitely "adequate".  800dpi are overkill.  And, at
 ~100KB per page, they are quite "affordable". 
I'm glad that you found out, what most people who really scan b&w
text&schematics knew all the time ;-)
And please, not another discussion about jpeg & b&w scans again.
The last BS about it is barely weeks ago ...