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Scientific American, Vol. 42, No. 11 (March 1880) (1880)
leaf 3
when_ this is set tlie mould is placed thereon and the moulding under the nosing. A band of brass or other for operating roller gates, recently patented by Mr. Henry the sides and crown of the sewer formed around it. A head metal, eit her plain, ornamented, nickeled, gilded, or enameted, Allen, of… … gates in a horizontal position. The We call attention to Mr. Walter's lower strand has a strong loop ALLEN'S IMPEOVED GATE. advertisement in another column. © 1880 SCIENTIFIC AMERICAN, INCPatents · Valve · Scientific American · Iron · Feet long · Engraving represents · Retinal changes · Scarlet fever · Annexed engraving · Patent office · Send stamp · Years ago · Drop hammer
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