Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 399
y^ 1613. CENTRE VALVE, for a gas house. Afour-part valve for a purifier. Arranged to cut outany one of four purifier pans. 1614. Plan showing position of valve. … MISCELLANEOUS DEVICES. 389
Mechanical movements
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