WARNING: All TIF's in this zip file are encoded as group-4 TIFF files. Not all software that claims to support TIFF can actually read group-4 TIFF. This format was chosen because it compresses to about half the size of either GIF or PNG for these files. Converting this chapter to electronic format posed some problems. Usually I scan documents at 300 dpi, 1bpp, then OCR it, reformat things in word, and rescan any continuous-level photos in gray- scale. However, except for the first page of the chapter, there is little regular text to OCR. Line art typically is best scanned at 300 dpi, 1bpp and saved as group 4 TIFF format. I'd normally insert this into the Word document, then when the whole mess was done, I'd save it to a PDF file. That didn't work this time. First off, many of the schematic pages have a halftoned background image that gave the scanner fits, due to aliasing during sampling. So instead I scanned it as 8bpp gray scale at 150 dpi, with descreening at 133 lpi (I don't know what the optimal approach is, I'm just describing what I did). I then messed with the brightness/contrast with photoshop, and saved each page as a JPEG with 50% quality level to keep the file size down. For some reason, this time even the pages with simple line art didn't convert to PDF very well. The raw files are around 5.5 MB of images; pasting all of this into Word results in a .doc file of about 6.5 MB; converting this to PDF without downsampling the images results in a file size of 32MB! (and the images still don't look as good as the originals). So, instead, here is a simple ZIP file containing the group-4 TIFF images for the pages where that made sense, and JPEG files for the others. The only exception is "index.txt", which is the chapter index page for the chapter. Oh, one more thing, the pages themselves are actually something like 22x11"; all pages but one only use about 16"x11" of that. My scanner isn't big enough for that. Instead, I copied all of the pages on a xerox machine at 73% maginfication, such that it would fit on an 8.5" x 11" page, then scanned that at 300 dpi. For the big schematic pages, I actually scanned the original in two passes (three in one case) and used photoshop to try and line up the two passes into one image; the seam is pretty hard to miss, but it is good enough. The pages as they appear in the original should be: i) index.txt 1) x-1.tif 2) x-2.tif 3) x-3.tif 4) x-4.tif 5) x-5.tif 6) x-6.tif 7) x-7.tif 8) x-8.tif 9) x-9.tif 10) x-10.tif 11) x-11.tif 12) x-12.tif 13) x-13.tif 14) x-14.jpg 15) x-15.jpg 16) x-16.jpg 17) x-17.jpg 18) x-18.jpg 19) x-19.tif 19) x-19.tif 20) x-20.jpg 21) x-21.jpg 22) x-22.jpg Jim Battle -- 1/21/02