xv, 4 Oshima: Formosan Termites 373 
Table XXIX. — Duration of life of worker termites in various neutral oils. 
Name of oil. 
Time. 
Mean. 
Min. sec . 
Min. sec. 
Min. sec. 
Min. sec. 
Min. sec. 
Min. sec.l 
Kurohana neutral oil 
163 00 
126 00 
150 00 
227 00 
233 05 
179 49 1 
68 00 
35 00 
61 00 
68 00 
68 00 | 
Akahana neutral oil 
46 00 
47 00 
46 00 
47 00 
46 00 
46 24 
Niizu neutral oil 
1 15 
0 40 
0 35 
1 15 
1 15 
1 00 
Table XXX. — Chemical properties of Niizu neutral oil. 
Color Pale yellow. 
Specific gravity (at 20° C.) 0.9091 
Flashing point (°C.) 97 
Fractional distillation : Per cent - 
Below 170 0.0 
170 to 270 1.0 
270 to 290 0.5 
290 to 310 2.3 
310 to 330 32.0 
330 to 350 43.5 
Above 350 18.5 
Residue (weight) 1.7 
Five, 10, 15, and 20 per cent solutions of camphor green oil 
were prepared and were injected into a great number of Japanese 
pine blocks (2 by 2 by 15 inches, or about 5 by 5 by 38 
centimeters) by means of full process (about 5 gallons per cubic 
foot, or about 18 lifers per 0.028 cubic meter, of timber). The 
treated blocks were buried in ground infested by Coptotermes 
formosanus, at Shakko, near Taihoku. For twenty-four months 
there was no damage; but after the lapse of thirty-one months, 
the blocks treated with the 5 per cent solution were slightly 
infested. 
Table XXXI. — Results obtained at the final inspection of Japanese pine 
blocks injected with solutions of camphor green oil. 
[Experiment started August 5, 1914. Blocks inspected March 7, 1915 ; August 8, 1915 ; August 
28, 1916 ; and March 24, 1917.] 
