Page:Popular Science Monthly Volume 60.djvu/158

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150
THE POPULAR SCIENCE MONTHLY.
 
PSM V60 D158 Railroad connections to industry around milwaukee.png
Fig. 2. Inclines entering grinding House and Tracks connecting with all Railroads entering Milwaukee.
 
 
 
 
PSM V60 D158 Bottom of kiln showing calcined material.png
Fig. 3. Bottom of Kiln, Campbell Patent, showing Calcined Material