382 Philippine Journal of Science is" 



Plate VII 



Fig. 1. A piece of infested brick wall, showing the passage of Coptotermes 

 formosanus through lime mortar (horizontal surface of the 

 bricks). White crosses indicate the dissolved passage. 



2. A piece of lime mortar which was evidently perforated by Copto- 



termes formosanus. 



3. Lateral view of one part of an infested brick wall, showing the 



void which contains several termites, Coptotermes formosanus. 



Plate VIII 



Fig. 1. Cross section of a rail fixed to a sleeper, showing the basal surface 

 of the latter broken by the tip of the spike. 



2. Cross sections of infested sleepers, passing through the position 



of the spike. 



3. Railway sleepers, of untreated chestnut, upper surface infested 



by Odontotermes formosanus. The positions of the rails are 

 indicated at the middle. Found in the main line near Tainan, 

 Formosa. 



Plate IX 



Fig. 1. Scene of the construction of a termite-proof concrete layer over 

 the whole surface of a building site. 

 2. A model of the termite-proof building construction in Formosa, 

 showing the concrete layer on the ground level. 



Plate X 



Fig. 1. Nippon Yusen Kaisha (N. Y. K. Steamship Co.) termite-proof 

 brick building, at Keelung, Formosa. 

 2. One part of the second floor of the N. Y. K. building shown in 

 fig. 1, showing the damage caused by Coptotermes formosanus. 



Plate XI 



Fig. 1. The experiment station at Tainan, Formosa. Blocks are dug out. 



2. Blocks used in an-experiment: a, control, untreated pine, after one 



week; b, a block of pine, treated with cypress pine oil, after 



one year; c, a block of pine, treated with camphor green oil, 



after one year. 



Plate XII 



Examples of termite-proof, brick building construction. 



Plate XIII 



Fig. 1. Brick building, showing the method of termite-proof building con- 

 struction adopted until the year 1916. 



2. Brick building, showing a new method adopted since the year 1916. 



3. Details of fig. 2, showing the construction of the second floor. 



4. Wood construction. 



5. Details of fig. 4. 



