The Puzzling World of Polyhedral Dissections
By Stewart T. Coffin

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Chapter 23 - Woodworking Techniques
Drilling Holes

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For puzzles that use pins and holes, if the holes are drilled accurately, you should be able to use a dowel fract0.gif-inch smaller in diameter than the hole. Buy the dowel stock in any hardware shop. Always use a simple jig arrangement to position the pieces accurately while drilling - never just a pencil mark. It is best to use a special bit with a spur point made for wood rather than the ordinary bits that are designed for drilling metal and will not make a clean accurate hole in wood. Some woods are much easier than others to drill cleanly. Walnut is excellent.

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