On Mon, 20 Jun 2005, GTH wrote:

A 200 dpi scan in JPEG format usually gives fairly correct results,
provided the JPEG compression isn't set too high. Each page is then a 1
Mb image.

JPG uses "lossy" compression (loses some data for the sake of better
compression), which is fine for photos. But with the compression set low
(higher number, nearer 100, 75 being considered normal) so you lose less
data, the file size gets pretty big. Better to use a format with lossless
compression, like GIF or TIF, for anything other than photos. They'll
give better reproduction, and usually smaller files.

-Dan