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78. Read, E. J. : The Crystalline Products of the Hardening of Portland 



Cement. J. Soc. Chem. Ind., 29, 735. 1910. (Discussion by Blount.) 



79. Reibling and Reyes : Physical and Chemical Properties of Portland 



Cement. III. Phillip. Jour. Sci., 6, 207. 1910. 



80. Richardson, Clifford: Portland Cement from a Physico-chemical Stand- 



point. Atlantic City, June, 1904. Also, Eng. News, Aug. 11, 1904, Jau. 

 20, 1905, Cement 1904-1905, 5, 3, et scq. 



81. Rohan. W. D. : The Effect of Sea Water, Alkali Water, and Sewage on 



Portland Cement. Eng. Cont, 24. 52. 1905. 



82. Rohland, P. : The Weathering of Stones and Mortars. Zeits. Chem. Ind. 



Kolloide, 8, 48. 1911. 



83. : Influence of Electrolytes on the Setting Time of Cement. Zeits. 



Angew. Chemie, 16, 622, 1903. Stahl u. Eisen. 28, 1815 1908. 



84. — : Causes for the Changes in Speed of Hydration in Cement. Zeits. 



Chem. Ind. Kolloide, 8, 251. 1911. 



85. Sabin, L. C. : Cement and Concrete. McGraw, 1905. 



86. Sager and Cramer: The Hardening of Previously Set Cement. Tonind. 



Ztg., 32, 1746. 1908. 



87. Schott, O. : American Portland Cement Concrete in Sea Water. Chem. 



Ztg., 35, 256. 1911. 



88. Shepherd and Rankin : Preliminary Report on the Ternary System 



CaO-Al 2 O a -Si0 2 . Jour. Ind. and Eng. Chem., 3, 211. 1911. 



89. Slichter, C. S. : Theoretical Investigation of the Motion of Ground Water. 



19th Ann. Report, U. S. Geol. Surv., pt. 2, 1899. 

 00. Smith, A. Erskine : Some Old Cement Tests. Cone. Eng., 4, 124. 1909. 



91. Society Scand. Portland Cement Mfrs. : Sea Water Tests of Portland 



Cements. Cement Age, 10, 184. 1908. 



92. Spackmann, H. S. : Relation of Lime Content of Cement to Durability of 



Concrete. Concrete, 11, 52. 1911. 



93. Spackmann and Lesley : The Hydraulic Properties of Reground Cement. 



Cement Age, 10, 1. 1908. 



94. Spalding. F. P.: Hydraulic Cement. Wiley, 1906. 



95. Stern, E. : The Setting and Hardening of Cement. Mt. Kgl. Materialpruf, 



28, 173. 1910. 



96. Stewardson, C. W. : The Effect of Alkali on Cement. Brick, 33, 102. 1910. 



97. Taylor and Thompson : Concrete, Plain and Reinforced. Wiley, 1905. 



98. Thatcher, E. : The Effect of Sea Water upon Portland Cement, Mortar 



and Concrete, and upon Steel Embedded Therein. Proc. Am. Soc. C. E., 

 34, (2). 1908. 



99. Thomas, E. : Colloidal Cement Waterproofing. Cement Age, 11, 158. 1909. 



100. Thompson, G. W. : The Classification of Fine Particles According to Size. 



Proc. Am. Soc. Test. Mat., 10, 601. 1910. 



101. Tornebohm (quoted in 80) : The Petrography of Portland Cement. Kong. 



Int. Verb. Material. 1897. 



102. Tuttle, M. C. : Decomposition of Concrete in Sea Water. Eng. News, 60, 



341. 1908. 



103. Unger, C. (Tr. by Michaelis) : Fused Portland Cement. Cement Eng. 



News, 22, 192. 1910. 



