Fig. 5 The Problem Stamp 2
I wish to thank Mr. Jack Reber for the loan of stamps that made these studies possible.
Technical Note:
This article was composed on a Power Macintosh Computer, using Microsoft Word. The stamps were scanned on an EPSON 1670 scanner, cropped and enhanced with the Adobe Photo Deluxe program, and printed with a 5150 HP Desk Jet 5150 series printer. Sections of the yellow stamps were reproduced in black & white, with greatly enhanced contrast.
Vol. 4 Nr 4 P 11
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