The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 41
iC? <= v////y///////^/m//////////m^^^^^^ … V/y^////-. ♦->/;» / .V//W///////////. * We are indebted to llie Editor of the Mechanics Magazine, for the use of theV ood engravings. = uo» u. mv being but about 9 inches in circumference at the aperture where the air isadmitted, and being only two of them to every 30 feet of main = 1 5 feet…
Architecture · Civil engineering · Science
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