xv, 4 Oshima: Formosan Termites 357 



Table XV. — Amount of ash and benzene extract in various woods. 



Name of wood. 



Origin. 



Cypress pine 



Teak 



Ipil. 



Molave 



Macaasira 



Mancono 



Kayil 



Malacmalac 



Aranga 



Banuyo 



Palo maria 



Dungon 



Grey gum Australia . 



Jarrah do 



Bansalaguin j Philippines 



White mahogany Australia - 



Black butt J do 



Pagatpat ■ Philippines 



Tindalo i do 



Batitinan • do 



Betis. I do 



Yellow narra | do 



Ikuki 1 Riu Kiu 



Australia .. 



India 



Philippines 



— .do 



.-..do 



— .do 



India 



Philippines 



....do 



-..do 



—.do 



.—do 



Chaaki ! do 



Wolly butt ^ I Australia .. 



Calantaa Philippines 



Tucang-calao '■ do 



Lanutan I do 



Amuguis ! do 



Acle i do 



White stringy-bark \ Australia .. 



Guijo ! Philippines 



Grey box — Australia 



Tallow wood 



Lim 



Apitong 



Red mahogany 



Red narra 



Supa 



Jungle wood 



Lanete 



Damage. 



— .do 



Cochin China 



Philippines 



Australia 



Philippines 



do 



Java 



Philippines 



Malugay. do 



Per cent. 

 0.00 

 0.00 

 4.00 

 8.00 

 18.42 

 24.00 

 30.00 

 S7.50 

 38.46 

 39.22 

 42.86 

 45.45 

 50.00 

 54.55 

 56.00 

 56.25 

 57.89 

 60.00 

 60.00 

 60.00 

 60.47 

 60.87 

 62.50 

 64.29 

 64.71 

 65.00 

 65.52 

 66.67 

 69.23 

 69.77 

 70.37 

 71.43 

 76.92 

 79.41 

 81.40 

 82.76 

 83.33 

 85.45 

 85.71 

 85.71 

 87.50 

 90.00 



Ash. 



Per cent. 

 1.51 

 2.96 

 1.37 

 2.97 

 1.54 

 2.58 

 2.00 

 1.43 

 4.25 

 0.75 

 2.65 

 5,26 

 0.74 

 1.00 

 1.77 

 0.33 

 0.42 

 3.74 

 2.30 

 6.48 

 2.25 

 L87 

 1.70 

 1.61 

 1.05 

 1.82 

 2.44 

 2.99 

 2.41 

 1.31 

 0.62 

 1.96 

 0.78 

 0.51 

 0.23 

 0.77 

 0.58 

 1.36 

 1.56 

 3.07 

 2.04 

 3.13 



Benzene 

 extract. 



Percent 

 5.98 

 6.22 

 0.68 

 2.60 

 2.31 

 0.004 

 3.80 

 3.37 

 0.01 

 0.15 

 2.93 

 0.79 

 0.53 

 2.65 

 0.05 

 0.65 

 0.05 

 0.27 

 1.99 

 2.43 

 0.06 

 2.23 

 0.37 

 0.36 

 0.14 

 1.50 

 2.19 

 0.44 

 1.79 

 1.51 

 0.16 

 1.13 

 0.40 

 1.68 

 2.22 

 0.004 

 0.26 

 3.80 

 0.80 

 0.U 

 0.002 

 0.13 



From Table XV it is evident that no special relationship exists 

 between the resistance and the amount of ash and benzene 

 extract. It is rather striking, however, that the percentage of 

 benzene extract contained in cypress pine and teak, which are 

 absolutely immune from the attack, is extraordinarily high. As 

 it is probable that some organic compounds extracted by benzene 

 are distasteful or repellent to termites, determination of the 



