s to lessen^their burdens in this respect. working very satisfactorily dredging on a southern river. embraces three classes of rays—the thermal, the visual, and Several are now working in railway excavations. Excavating for railways and canals has hitherto been gen- the chemical. These divisions… … SAGE & ALGER'S • PATENT EXCAVATOR AND DREDGING MACHINE. machines invented for this purpose, they have not been gen- to the machinery. The engine is provided with a governor, ical, and vice versd. The vast body of thermal rays is here and other appliances for the economical application of the erally…
Patents · Iron · Assignor · Machine · Molten iron · Surface · Infusorial silica · Fog signals · Wrought iron · Antedated april · Scientific American · Steam engine · Union stone · Carbolic acid · Sun spot
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