xxxiv LIST OF TABLES. 



PAGE 



227. Comparative tests of Portland cement and sand-cement 594 



228. Tensile and compressive strength of " 594 



229. Compressive strength of silica-cement cubes 596 



230. " " sand-cement mortars 597 



231. Modulus of elasticity of sand cement 597 



232. Effect of heating on compressive strength 598 



233. " " alumina 603 



234. Analyses of pozzuolana from Italy 633 



235. " " " France 634 



236. " " " " the Azores 635 



237. " " trass and related materials from Germany 636 



238. ' ' " santorin ash, from Santorin 636 



239. " " ar6nes, France 637 



240. Strength of basaltic dust 637 



241. Average analyses of natural pozzuolanic materials 638 



242. Strength of lime burnt-clay mortars 639 



243. Analyses of slags used for slag-cement 643 



244. Strength of granulated and ungranulated slag 648 



245. Working results of Ruggles-Coles drier 651 



246. Analyses of limes used in American slag-cement plants 654 



247. Costs of slag-cement manufacture, per barrel 664 



248. Slag-cement production in U. S., 1899-1904 664 



249. Analyses of American slag-cements 667 



250. " "European " " 668 



251. Tensile and compressive strength of slag-cements 671 



252. Crushing strength of indurated slag-bricks 683 



253. Porosity of slag-bricks 683 



254. Anatyses of slag used for slag-blocks 689 





