492 



No. 4. (Dammar Soon^yi) (Sungei). — This weighed nearly four- 

 teen ounces, and consisted of irregularly shaped lumps of dark-brown 

 resin, which was translucent in thin pieces. The resin was hard; it 

 dissolved partially in alcohol or ether and completely in oil of turpen- 

 tine, forming a brown opaque solution which dried on wood, leaving 

 a light brown, soft, dull " coat." 



No. 5. (Dammar Meranti, derived from, various Shoreas. of 

 inferior quality).— This sample weighed about twenty ounces, and 

 consisted of a single lump of opaque, yellowish-white resin, which was 

 friable and softened readily when rolled betv/een the fingers. It was 

 partially soluble in alcohol or ether, and formed with oil of turpentine 

 an opaque varnish which when applied to wood left a dull and sticky 

 "coat." 



No. 6. (Dammar Mata Kuching from Jempol). — The sample 

 consisted of a lump of hard, transparent, pale amber-coloured resin, 

 weighing about seven ounces. It was free from foreign matter and 

 was partially soluble in alcohol and completely soluble in ether. It 

 dissolved in oil of turpentine to form a pale 3-ellow transparent 

 solution, which di ied on sized wood, forming a hard, brilliant, and 

 almost colourless varnish similar to that produced by Sample No. I. 



No. 7. (Dammar Rengkong .?). — This weighed about two ounces, 

 and consited of small pale yellow, hard and transparent tears. It was 

 partially soluble in alcohol or ether and dissolved completely in oil of 

 turpentine, forming an opalescent solution, which dried on sized 

 wood leaving a "coat" which was hard, but lacked gloss. 



No. 8. (Dammar Merawan from a Shorea). — The sample weighed 

 nearly two ounces, and consisted of large translucent, yellowish-white 

 tears of resin. It was partially soluble in alcohol, completely so in 

 ether, and formed an almost colourless solution in turpentine oil, and 

 this on drying left a fairly hard, clear, glossy "coat" inferior to those 

 produced by Nos. I, 3. and 6. 



No. 9. (Dammar strayah) (Seraya). — This weighed about five 

 ounces, and consisted of lumps of pale yellowish-brown resin showing 

 a laminated structure. It was partially soluble in alcohol or ether. 

 The solution in oil of turpentine dried to a fairly hard "coat" which 

 was devoid of gloss. 



Chemical Examination. 



The nine samples of resin, when chemically examined, gave the 

 results recorded in the following tables - 

 No. I. 2, 3, 4, 5, 6, 7, 8, 9 



Melting point QO'c 94''c 87-c iSo^c 185 c 92 c 200^c 97'c 190 c 



Ash per cent O.26. O.08. O.05. 0.52. O.03. 0.06. O.04. O.25. O.09 



Saponification number * 46.7. 72.O. 38.5. 34.3. 72.0. 33.O. 46.7. 38.5. 55.O 



Acid number * 45.3- 72.0. 38.5. 33-0. 72.0. 33.0. 46.5. 38.5. 55-0 



Ester number * 1.4. - - 1.3. - — 0.2. — — 



* Milligrams of potash required for one gram of resin. 



