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Books Books 1 - 7 of 7 on ... feet wide. In the middle is a hole with a conduit leading to the ditch, in which....  
" ... feet wide. In the middle is a hole with a conduit leading to the ditch, in which is formed a receptacle for the resin as it flows out. Upon the surface of the mound, beaten hard and coated with clay, the wood is laid round in a circle like rays. "
The North American sylva, or, A description of the forest trees, of the ... - Page 139
by François André Michaux, Augustus Lucas Hillhouse - 1819
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The Sylva Americana: Or, A Description of the Forest Trees Indigenous to the ...

Forests and forestry - 1832 - 408 pages
...wood which it is to receive : to obtain one hundred barrels of tar, it should be eighteen or twenty feet wide. In the middle is a hole with a conduit...truncated at two-thirds of its height and reversed, being twenty feet in diameter below, twenty-five or thirty feet above, and ten or twelve feet high. It is...
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Sylva Americana: Or, A Description of the Forest Trees Indigenous to the ...

Daniel Jay Browne - 1832 - 408 pages
...wood which it is to receive : to obtain one hundred barrels of tar, it should be eighteen or twenty feet wide. In the middle is a hole with a conduit...formed a receptacle for the resin as it flows out. Upon die surface of die mound, beaten hard and coated with clay, the wood is laid round in a circle like...
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Arboretum Et Fruticetum Britannicum: Or, The Trees and Shrubs of ..., Volume 4

John Claudius Loudon - Forests and forestry - 1838
...is formed a receptacle for the tar as it flows out. Upon the surface of the mound, after it has been beaten hard, and coated with clay, the wood is laid...when finished, may be compared to a cone truncated at two thirds of its height, and reversed ; being 20 ft. in diameter below, 25 ft. or 30 ft. above, and...
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Arboretum et fruticetum Britannicum; or, The trees and shrubs of Britain

John Claudius Loudon - 1838
...Quantity of wood which it is to receive : to obtain 100 barrels of tar, it should be 18 ft. or 80 ft. wide. In the middle is a hole, with a conduit leading...the ditch ; in which is formed a receptacle for the tar as it flows out. Upon the surface of the mound, after it has been beaten hard, and coated with...
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Arboretum et fruticetum britannicum: or, The trees and shrubs of ..., Volume 4

John Claudius Loudon - Botany - 1838
...18 ft. or 20 ft. wide. In the middle is a hole, with a conduit ARBOKETUM AND FHUTICETUM. PART III. leading to the ditch ; in which is formed a receptacle for the tar as it flows out. Upon the surface of the mound, after it has been beaten hard, and coated with...
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Naval Stores: History, Production, Distribution and Consumption

Naval stores - 1921 - 286 pages
...of wood which it is to receive. To obtain one hundred barrels of tar it should be eighteen or twenty feet wide. In the middle is a hole with a conduit leading tu the ditch, in which is formed a receptacle for the resin as it flows out. Upon the surface of the...
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The Penny Magazine of the Society for the Diffusion of Useful ..., Volume 12

Charles Knight - 1843
...ditch. The diameter of the pile is proportioned to the quantity of wood which it is to receive, and in the middle is a hole, with a conduit leading to...the ditch, in which is formed a receptacle for the tar as it flows out. Upon the surface of the mound, after it has been beaten hard and coated with clay,...
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