ishes so much. in Chicago, but Professor Graydon claims that his instru- It requires no special skill to operate it, and one kind of ing cups, pails, etc., in different positions, and an auxiliary ment is a great improvement upon that. step, which folds down upon the main step, may at any time… … attached to the Third Intermediate School C, engages the ratchet wheel when the recently. Among others was one, a bright bellows expands, But it does not do so THE AUTOPHONE. looking colored girl, who was entirely deaf. regularly, its movements being controlled The professor talked to her at a…
Patents · Patented · Water · Iron · Water power · Scientific American · Coloring matter · Water ice · Export edition · Music sheet · American export · Elevated railway · Tensile strength · Window cleaning
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![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten05unit-226-0.webp)
