| http://www.w3.org/ns/prov#value | - tivity as well as a wealth of still-useful information for building barbecue pits, chimneys, warming units, and other outdoor heating sources.Coverage includes considerations of general design problems and their solutions; discussion of detailed designs, from foundations to chimneys; construction materials, including iron, brick, concrete, stone, and sand; and specific types of camp stoves and fir
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