INDEX. 697 



Compressive strength; of slag cements, 670-671 

 Constitution of hydraulic limes, 172-176 



natural cements, 195-199, 223 

 plasters, 31-32 

 Portland cement, 566-575 

 slag cement, 667 



Cost of burning lime, 106, 108, 109-112 

 natural cement, 248-250 

 plasters, 52 



Portland cement, 558-561 

 Cost of dredging marl, 379-381 

 Cost of drying cement materials, 378 

 coal, 520 



slag, 649, 663, 664 



Cost of erecting Portland-cement plant, 555-557 

 Coct of excavating cement rock, 219-221, 378-379 

 clay, 373 



gypsum, 29, 30, 52 

 limestone, 379 

 marl, 379-381 



natural-cement rock, 219-221 

 Portland-cement materials, 378-381 

 shale with steam-shovel, 373 

 Cost of fuel, see Cost of burning. 

 Cost of labor in lime plants, 106, 108, 110-112 

 natural-cement plants, 248-250 

 plaster plants, 52 

 Portland-cement plants, 558-559 

 Cost of land and quarries, Portland cement, 555 

 Costs, of manufacturing cement plaster, 52 

 hydrated lime, 128 

 lime, 106, 108, 110-112 

 lime-sand brick, 140-142 

 natural cement, 248-250 

 oxychloride cements, 167 

 plaster of Paris, 52 

 Portland cement, 554-561 

 slag bricks, 684-685 

 slag cement, 663-664 

 Sorel stone, 167 



Cost of mining, see Cost of excavating. 

 Cost of plant for hydrated lime, 128 

 lime-sand brick, 140 

 Portland cement, 555-557 

 slag brick, 684 



Cost of preparing coal for kiln use, 520 

 Cost of quarrying, see Cost of excavating. 

 Crackers, 35, 239, 430 

 Creighton, Prof., on strength of natural cements, 276 



