xv, 4 Oshima: Formosan Termites 355 
Table XIII . — Relationship between resistance and weight of various woods. 
Wood. 
Degree of weight. 
Damage. 
Per cent. 
Ipil 
4.00 
8. 00 
18. 42 
24. 00 
38. 46 
39. 22 
42.86 
45.45 
56. 00 
60.00 
60. 00 
60. 00 
60.47 
60. 87 
65. 00 
69. 23 
69. 77 
71.43 
81.88 
85. 45 
87.50 
90. 00 
Table XIV. — The weights of woods of various specific gravities. 
Specific 
gravity. 
Per cubic 
meter. 
Per cubic 
foot. 
! 
Very heavy-— - - 
90 or + 
Kilos. 
900 or -f 
Lbs. 
56 or -f 
70 to 90 
700 to 900 
Moderately heavy — - — - - — 
50 to 70 
500 to 700 
31 to 44 
50 or — 
500 or — 
31 or — 
As shown in Table XII, mancono and aranga, which are in- 
cluded in the group “very hard,” are more seriously attacked 
than ipil, molave, and macaasim of the group “hard;” banuyo 
is less attacked than harder woods, such as palo maria, tindalo, 
etc. ; calantas, a soft wood, is also less attacked than tucang- 
calao, amuguis, acle, etc., which belong to the group “hard.” 
Table XIII shows that ipil, molave, and macaasim, which are 
included in the group “heavy,” are less attacked than very 
heavy mancono; that dungon, bansalaguin, batitinan, etc., are 
more seriously attacked than banuyo and palo maria of the 
group “moderately heavy;” and that amuguis, acle, guijo, etc., 
are also more seriously attacked than calantas, a light wood. 
