riiiLiiTiM:: WOODS. 363 
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IMMUNITV FKOM ATTACK. 
TTardness. — A few "woodsj such as inanoono {Xanfhosfrnioti vcrdiigo- 
nianus Xaves) for piling and molave ( Vitex spp.) for house constniotionj 
seem to be imnuuie from attack because of their liardness. As a rule 
the hanlwooris arc very niuch freer from inseef^ and teredo atfack than 
are the soft kinds. 
Taste and odor. — It seems probable that some woods may be safe 
from insects becaii.^o of a taste or odor whicli is not a;^i'ooable to tlie 
invaders. This is supposed to be tlie case with cahmtns {Toona ^pp.)- 
IMl'KEGNATION AND OTHER AKTIFICIAL MKANS OF HEKKNSE AOAINST INSKrTS ANI> TKREDO. 
Creoaoiing. — Creosoting, in the very few cases in which it bas been 
tried iu the Islands, has been very satisfactory, but it can not as yet 
come into common use because of the present pruhil>itive cost of creosote 
in Manila. 
F 
Impregnation wHli ynincral mils may prove effective, if some way can 
be found of precipitating the salts in tlje wood so that they will not 
leech out under the action of tbis moist climate. 
Pointing a wood has proved effective so long as the painted surface 
does not become cracked. 
There is further need of experiment to determine what Philippine 
woods are most immune to insect and teredo attack, and what are the 
best artificial means of defense. 
USKS OF nilLimXE WOODS. 
While complete tests have-not been carried out for any Phill])pine 
woods, certain of them have been found to be particularly well fitted 
for especial uses, and the ellort is here made to group the woods of 
commerce according to their tisc. 
1. In places expoficd to salt water and fcntlo allack. — For pilinj;; Liiisin, 
betis, aranga, maneono, banaba, batitinaii, bolungeta, dun/ron, dufigoii-lato, man- 
gacliapuy, molave, and yacal are used; but the first four mentioned give the 
best satisfaction. 
Ill addititm to these tliere is agolio, wliicli by lis great hardness and it-i 
normal, tapering shape seems to be well fitted for piliuj,'. It iseems not yd to 
liave been tried for that i)urpoae. 
For ship and boat buildinj:: Teak, usually of the first iniportanee as a ship- 
building wtx>d, is of sttuill luiiKirtanee in the Philippitu's because of its very 
restricted occurrence. It is obtaiiuible ojily iu ^niall ipianUtit's. 
For keels and other parts of ships exposed t" -alt water: Aran«,'a, banalfa, 
bansalaguin, betis, dungon, guijo, liusin, molave, narra, i)aIo niaria, and yacal 
are used. 
For small boats, bancas, caseoes, etc., a large n\uiil>er of difTercnt wtjods arc 
employed, among which are: Apitong, auuiguis, baucal, bunuyo, ealantas, white 
lauan, lumbayao, malasantol, maliigay, mangachapuy, and tanguile. 
2. In places where the wood is in contact with the ground. — For corner posts 
of houses [harigucs) : ^Nbdave, ipil, aclo, agobo, alupng, nnubing, anntga, ba- 
uaba, bansalaguin, bauuyo, batitiuan, betis, calamansanay, dufigou, dufigon-Iate, 
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