ere, if we except the portion in front of the Rue du artificial concrete made of coal tar and gravel, or some in- Conservatoire, which is made out of cast asphalt, has never Paris from Seyssel peculiar description. The rock arrives at These lumps are in lumps containing several cubic inches, ferior… … As the subject of road making is at this time one of cur- i ways has been developed very rapidly. The first attempts in crushing mill. This mill is of English origin and is based rent interest, and as the genuine asphalt roads in Paris are 1854 were made on a surface of about 890 square yards, and…
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.
