melted was 172,000 pounds, time of But the repair of a macadam road is both slow and expensive, necessitating the blocking of the thorough- melting 714 hours, time of casting 23 minutes. After the fare for several days. Then, again, pedestrians incur gun was cast, water was run through the core for… … of the road upon which the scarifier is at power of emitting light. These are allow- A SCARIFIER FOR ‘MACADAM ROADS. work. ed to propagate in a liquid bouillon of special composition. When the experi- The scarifier consists of a dozen chisels ment is made with good microbe cultures to start with,…
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