ed. These alternating only 8 pounds. This remarkable fact illustrates the advan- The western mouth of the tunnel is located in a deep ra- periods of idleness and activity have occupied fifteen years ; vine at the base or the mountain, about two miles south of tage of compressed air as a motor for… … expensive. which they carry ' " - ' ' ■'v/ih:vfiM/&M'ii'^':^:/^' 'Mm'T^"^/^- Up the mountain, things on indicates about half a mile a completion of the tunnel much earlier than the date of the tunnels, and other difflcult places ; the exhausting air also beyond the end of the brick tunnel, a…
Patents · Antedated · Tunnel · Asphalt · Patent office · Oil · Spontaneous combustion · Snatch block · Cubic feet · Feet high · Patent fund · Steam engines · Fine patina · Horse hay · Oil globules
Internet Archive · Public domain (published before 1931). Free to use for anything.
![An illustration from XIXe [i.e. Dix-neuvième] siècle (en France); classes - moeurs - usages - costumes - inventions. Ouvrage illustré d'un front. chromotypographique, de 16 planches coloriées aux patrons, de 36 entetes et lettres ornées et de 487 gravures (dont 24 tirées hors texte) d'après les principaux artistes du siècle (1893)](https://img.insideoutlibrary.com/img/200/ia-xixeiedixneuvi00granuoft-668-488.webp)
