216 
The Philippine Journal of Science 
s £ 
8 S 
54 8 
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Compressive strength of 
concrete, in pounds per 
square inch; ultimate 
stress. 
s-qjSuojjs oaissojcI 
-lUOO UB8UI ’ UIOJJ 
UOIJBUBA UmUIIXBJ^ 
P. ct. 
26 
17 
15 
15 
26 
44 
47 
46 
21 
4 
55 
37 
8 
•soijos jo arq-BA ubo;^ 
894 
1,238 
1,097 
594 
1,161 
2,659 
1,384 
1,841 
1,057 
484 
1,199 
* SO I JOS 
JO onjBA mrunix-B]^ 
1,125 
1,454 
1,259 
734 
682 
875 
1,708 
778 
3,205 
1,620 
1,917 
1,639 
617 
1,298 
'SO I JOS 
jo onjBA uinunuipi 
778 
1,033 
977 
566 
440 
400 
870 
313 
2, 191 
1,073 
1, 781 
794 
305 
1,142 
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1:2:4 
1:2:4 
1:3:6 
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1:2:4 
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suounoods jo poSbjoab sjiilsoh 
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Days. 
42 
57 
29 
30 
30 
33 
29 
36 
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preserved in— 
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Days. 
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13 
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Days. 
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