Table 8. — Compressive strength of Portland cement concrete made in various parts of the Philippine Islands — Continued. 
148 
The Philippine Journal of Science 
1921 
g-o 
Test specimens pre- 
served in— 
Water. 
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|'5 
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1 
T 
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X 
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X 
X 
X 
X 
X 
X 
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Source of aggregate. 
Gravel. 
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hi 
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1 
11 
j *8 
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Oct. 8, 1919 
Opt 11. 191K 
Oct. 26, 1916 
Nov. 6, 1915 
Ttfnv 11 191K 
i 1 
Aug. 19, 1916 
do 
Sept. 13,1916 
Nov. 27,1915 
Nov. 30,1915 
Sept. 13,1915 
Jan. 11,1916 
Jan. 26,1916 
Sept. 9,1915 
do 
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Mar. 22,1916 
Mar. 23,1916 
Sept. 7,1915 
Oct. 15,1915 
Aug. 19, 1915 
Structure in which concrete was used. 
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Hilongos Market (floor) 1 — 
runong triage, isato 
Do 
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