Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 113
gue with an undercut shoulder on thelower side is stuck on the solid all round oneblock, and a corresponding groove in theother, and when the two come together theyform a dovetail groove into which the masticis pressed when laying, thus forming a solidkey with the bed. Duffys patent is shownin Fig.… … Fig. 399.—Gearys Patent Block Floor. distance apart, whether on the end or side,and therefore the blocks can be laid inseveral combinations. In Gearys patent(Fig. 399) each block is fixed to the masticbv means of two metal keys driven into the
Carpentry · Joinery
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