FIG. 
ILLUSTRATIONS 
1. A group of large dipterocarps in the forest of northern Ne- 
gros. Frontispiece. 
Page. 
2. Agathis alba (almaciga), the source of Manila copal................ 17 
3. Trunk of Agathis alba (almaciga), with scars from which 
fi Pays EG Cone A eRe 616 cy acae Ae a a eRe 19 
Ace hriok of gales aloe (imation )\ 22...) foo SA 21 
5. Forest of Pinus insularis (Benguet pine) in Benguet moun- 
TEE RAVSU A) oA ISO pa sont PR Re IP ee ena eC ae ee 29 
6. Pinus insularis (Benguet pine), a source of turpentine............ 31 
1. trunk of Pinus insularis (Bénguet: pine)... -..22:....2:---.-------.-- 33 
8. Pinus.merkusii (Mindoro pine), a source of turpentine........ 34 
9. Sindora inermis (kayu-galu), the source of kayu-galu oil........ 35 
10. Sindora supa (supa), the source of oil of supa...............-.--......--- 37 
11. Canarium luzonicum (pili), the source of Manila elemi............ 39 
12. Resin exuding from a tapped Canariwm..............-.-..---..----------- 41 
13. Canarium villosum (pagsahingin), the source of pagsahingin 
LESS RO es LO a SOR AT ete oe Dae OP MRE Tn lee en aS SY eee 49 
14. Anisoptera thurifera (palosdpis), the source of palosapis 
TR ESY a yews 2 SN MEO. «ol eagle Oe ee ORR een eee ans Marae 51 
15. Bark and leaves of Anisoptera thurifera (palosapis) ............ 53 
16. Dipterocarpus grandiflorus (apitong), a source of balau.... 55 
17. Bark and leaves of Dipterocarpus grandiflorus (apitong) .... 56 
18. Fruits of Dipterocarpus grandiflorus (apitong) -................... 57 
19. Dipterocarpus grandiflorus (apitong) boxed for resin.......... 59 
20. Dipterocarpus vernicifluus (panau), a source of balauw........ 61 
Zi. Wipterocarpus verniciiius (pana)... 63 
22. Bark and leaves of Dipterocarpus vernicifluus (panau), a 
SECCEP CL 01 Fe 0 RRR Re, NRCee emeees saeS Ee 64 
23. Artocarpus cumingiana (anubing), a source of chewing gum.. 67 
24. Artocarpus elastica (gumihan), a source of chewing gum.... 69 
25. Palaquium ahernianum (kalipaya), a source of gutta-percha... 73 
26. Tapping a gutta-percha tree in such a manner that all the 
milk is collected in shells beneath and none lost. Done 
yyuloros ane hawi= Weil. oe ee eas 75 
27. A gutta-percha tree tapped in such a manner that the 
flowing milk is not all absorbed by the chopped-up bark, 
but much of it is lost on the ground below. Tucuran, 
Distrrce ot Zambhoansa, Mindanao... occ oi. et eo ge ffi 
Zonolita-percha as ib reaches the market. ....c.......---:20-<c.-0:---_a- 79 
29. Leaves and fruit of Payena leerii, a source of gutta-percha.. 81 
nm 
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