randa, etc. Furthermore, if the conversation is valuable in all public places, such as schools, halls, of- If for any cause nose breathing is too difficult, the fices, and the like, and also in private residences. A plate may be reversed, thereby admitting air, but an nections, as it be- patent on… … oted on this bracket, at the center, is an arm which swings horizontally. The arm is preferably formed of two pieces, which are adjustably secured so that the device may be extended, as desired. A pulley is mount- ed at the outer end of the arm, and the clothes-line passes over this pulley, and…
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![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten15unit-233-147.webp)
