Page:Cassells' Carpentry and Joinery.djvu/83

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to 300); the screw heads enter the holes bored for them, the edge is then slotted for about ¾ in. beyond the hole to allow the stem of the screw to pass along, the head projecting beyond the stem forms the key, and then the boards are merely slid together tightly, so forming a strong joint which can be taken apart easily.