ILLUSTRATIONS. 
PLATE I. 
A segment of a reinforced beam of reconstructed stone. 
PLATE II. 
An exhibit of reconstructed stones and marbles at- the 1907 Building 
Trades Exhibition, Olympia, England. 
PLATE III. 
Fig. 1. A sand-lime brick which disintegrated during the hardening process 
on account of the presence of unslaked, free lime. 
2. Sand-lime brick made from Maytubig beach sand (cf. mixture 38, 
Table VII). 
PLATE IV. 
Fig. 1. Sand-lime brick made from Talim quarry, basalt rock (cf. mixture 
23, Table XVI). 
~ 2. Sand-lime brick made from Maytubig beach sand (cf. mixture 4, 
Table VII). : 
PLATE V. 
Fig. 1. Sand-lime brick made from Pasig sand (cf. mixture 6, Table VIII). 
2. Sand-lime brick made from crushed Benguet sandstone (cf. mixture 
25, Table XIX). 
Puate VI. 
Fig. 1. Sand-lime brick made from Meycauayan volcanic tuff (cf. mixture 
18, Table XII). 
2. Sand-lime brick made from Sisiman quarry andesite rock (cf. 
mixture 22, Table XV). 
PLATE VII. 
Sand-lime bricks made from Philippine raw materials, heated to 1,100° 
and plunged into water. 
Fig. 1. Coarsely ground. Tarlac sand, brick mixture. 
. Brick mixture containing equal parts of Pasig and beach sand. 
. Voleanic tuff, brick mixture. 
. Finely ground. Tarlac sand, brick mixture. 
. Brick mixture containing equal parts of Tarlac and beach sand. 
. Pasig sand, brick mixture. 
PLATE VIII. 
D oe co bo 
Common sand-lime brick made from Philippine raw materials. (Upper, 
cf. mixture 10, Table X; lower, cf. mixture 16, Table XII.) 
Fic. 1. Before subjection to crushing in the compression test. 
2. After subjection to crushing in the compression test. 
Text FIGURE. 
Fic. 1. Map of the vicinity of Manila (1 millimeter equals 1 kilometer). 
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