30 
Moura. 
Cement. 
p. 841. 
Mutu, W. Decomposition of Cement 
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(1909), p. 417-418. 
Discusses “‘swelling’’ of cement upon agitation 
in water. Describes experiments and progres- 
Sive observations. 
NEUMAN. Action of Acids on Concrete. 
Ton. Zeit., v. 36, p. 601-604, 712. 
Abs., Chem. Abs. Five (1912), p 
1832, 1974. 
Discusses cases of concrete sewer and tunnel 
failures and causes and nature of disintegration 
of underground concrete. Preventative meas- 
ures suggested. 
Decomposition 
of Portland 
Ton. Zeit., 
v. 33 (1909), 
Newuat., C. A. Disintegration of 
Concrete in Railway Tunnels. Pacific 
N. W. Soc. Engineers, Oct.—Nov., 
1916, 17 p. 
New York (Ciry) Boarp or WATER 
Suppty. See II 
NitzscHE, H. Barium Carbonate as a 
Protection Against Attack of Sulphate- 
Containing Solutions. Zement (Feb. 
15, 1923), p, 51. Chemisches Zen- 
tralblatt (1921), p. 598. 
Ocus, E. J. Action of Sulfuric Acid on 
peels Concrete, v. 22 (1923), 
: Brief account of investigation showing harmful 
effects of sulphuric acid. 
OtmstEaD, F. H. and H. Hamtin. 
Converting Portions of the Los Angeles 
Outfall Sewer into a Septic Tank. 
Eng. N., v. 44 (1900), p. 317-318. 
Eng. N., v. 41 (1899), p. 389-390. 
(Disintegration noted.) 
Describes plans for altering outfall sewer at Los 
Angeles. Report on disintegration of brick and 
mortar portions. 
See IT. 
Orton, E., Jr. and others. 
Pacini, A. B. Metamorphism of Port- 
land Cement. Annals New York 
Academy of Science, v. 22 (1912), 
p. 179-219. 
Discusses processes involved in setting and 
hardening of cement and effects of various in- 
gredients and treatments. Laboratory experi- 
ments and results. Tabular data. 
Page, L. W. See V. 
Parson, H. De B. Influence of Sugar 
on Cements. Eng. N., v. 18 (1887), 
p. 461. 
Describes strength tests on mortar briquettes 
made with sugar admixtures. Tabular data. 
Petry, W. Effect of Acids and Salis 
on Concrete. Bauingenieur, v. 1 
(1921), No. 1, p. 12-14. 
Puitippr. Solubility Tests in Lime- 
Silica Series. Ton. Zeit., (1910), 
p. 1319. 
Prumsp R. A. Progress in Proofing 
Concrete Against Chemical Action. 
Concrete, v. 8 (1908), no. 8, p. 37. 
Abs., Chem. Abs., v. 2 (1908), p 
2611. 
Discusses acid action on concrete. Describes 
tests of protective coatings and results. 
BULLETIN 1314, U. S. DEPARTMENT OF AGRICULTURE 
Powers, M. I., Jr., Effect of Salt in 
Mixing Cement Mortars. Eng. N.,, 
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Tests showing early gain in strength over 
fresh-water mortars. 
Putver, H. E. Effect of Salts on 
Strength of Concrete. Wis. . Eng., 
v. 18 (1913), p. 6-13. Eng. Rec., 
v. 68 (1913), p. 466. Conc. Cem. 
Age, v. 3 (1913), p. 256. 
Results of laboratory strength tests on con- 
crete cubes to which sodium chloride and calcium 
chloride were added in mixing water. Cured 
at high and low temperatures. Tabular and 
diagrammatic data. 
Reyss, F, .D...-See Wirt, J... C. 
and, Dy RExES, LV: 
Ricuarpson, R. D. Effect of Mine 
Water on Concrete. Eng. Rec., v. 
63,,G911),: p-f5. 
Tests on concrete in acid mine water near 
Scranton, Pa. 
Ropt, V. Behavior of Poriland Cement 
in Different Salt Solutions. Mitt. 
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Soe. Chem. Ind. Jour., v. 35 (1916), 
p. 541. Chem. Abs., ‘vy. 10 (1916), 
Du2l3o: 
Discusses laboratory tests to determine the 
extraction of lime from mortar by various salt 
solutions. 
RoHLAND, P. Action of Sulphur Com- 
pounds on Cement and Concrete. 
Bet. u. His., v. 18 (1914), p. 241-242. 
ce Chem. Abs., v. 8 (1914), p 
3107. 
Discusses injurious action in railway tunnels. 
Activity of Absorbed CO3 ions. 
Zeitschrift fiir Chemie und industrie 
der Kolloids, v. 5, p. 33. 
Behavior of Cement and Concrete 
in Contact with Salt Solutionsand Acids. 
Mitteilungen der Centralstelle zur 
Forderung der Deuschen Poet 
Cement Industrie, v. 3, p. 2-4. 
Abs., Chem. Abs., v. 8 (1914), p 
1493. 
Discussion of chemical action of soil alkalies 
and acids on concrete. 
Causes of Efflorescence on Mor- 
tars. Zeitschrift fiir Chemie und 
Industrie der Kolloids, (1910), p. 48. 
Decomposition of Portland 
Cements. Zeitschrift fiir das Gesamte 
(Brauwesen), (1906), p. 704. 
Effect of Humus, Sulphur Com- 
pounds and Electric Currents on Con~ 
crete, Particularly Reinforced Concrete. 
Stadt. Tiefb., v. 2, p. 105-06. Was. 
u. Abw., v. 4, p. 843. Abs., Chem. 
Abs., v. 6 (1912), p. 144. 
Discusses action of these agents and protective 
coatings for concrete. 
Reinforced Concrete and Electric 
Current. Stadt. a , v.38, p. 1617. 
Was. u. Abw., v. 5, ot Abs., 
Chem. Abs., v. 6 (1913). 3173. 
Discusses action of electric current Het electrol- 
ysis. 
