es, everything failed until Lesperance's ventilator It is then drawn toward the operator with a gentle pressure. was tried. The latter was placed in every window of the The tool emits a peculiar singing sound as the edge cuts the asylum, and found to completely ventilate the building. glass. He… … vessels, in both instances, with zinc, and that by almost the identical means now followed in the so- it can be used with great facility, that it is not liable to get called galvanized iron manufacture. The term " galvanizing," out of order or break, and that it will cut glass even more long known…
Patents · Iron · Zirconia · Velocity · Steel · Steel rails · Water · Tensile strength · Scientific American · Railway car · Wrought iron · Antedated june · Water wheels · Patent office · Cast Iron · Heated air
Internet Archive · Public domain (published before 1931). Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer04inte-444-215.webp)
