Inside Out Library · Explore

Scientific American, Vol. 94, No. 3 (January 1906) (1906)

leaf 11

An illustration from Scientific American, Vol. 94, No. 3 (January 1906), 1906, leaf 11
schools, halls, of- If for any cause nose breathing is too difficult, the long, or if there is any material delay in making con- fices, and the like, and also in private residences. A plate may be reversed, thereby admitting air, but an nections, as in long-distance communication, it be- patent on… … journaled on plates, which are hinged to the main ADJUSTABLE WINDOW VENTILATOR. AN IMPROVED TELEPHONE INSTRUMENT.

Patents · Canal · Manufacture · Fiber · Device · Electric furnace · Scientific American · Cushion sole · Alternating current · Rapid transit · York city · Sewing machine · Gas engine · Brass tube · Panama canal

Internet Archive · Public domain (published before 1931). Free to use for anything.

More pictures from Scientific American, Vol. 94, No. 3 (January 1906)

More like this