_Carapa_ or _Andiroba oil_, derived from the seeds of a tree (_Carapa Guianensis_) grown in West Indies and tropical America, has been suggested as suitable for soap-making. Deering (_Imperial Institute Journ._, 1898, 313) gives the following figures:-- ____________________________________________ | | | | | Saponification | Acidity | Melting Point | | Equivalent | Per Cent. | of Fatty | | | | Acids, deg.C. | |________________|___________|_______________| | | | | | 287 | 12 | 89 | |________________|___________|_______________| Another observer (_Rev. Chem. Ind._, 13, 116) gives the setting point of the fatty acids as 56.4 deg. C. _Candle-nut oil_ obtained from the seeds of a tree flourishing in India and also the South Sea Islands. The following figures have been published:-- _____________________________________________________________________________ | | | | | | Saponi- | | | | | fication | Titre,| Iodine No. | Observers.| References. | Equiv- | | | | | alent.[1] | deg.C.| | | |___________|_______|____________|____________|_______________________________ | | | | | | 299-304.9 | 13 | 136.3-139.3| De Negri |_Chem. Centr._, 1898, p. 493. | 291 | | 163.7 | Lewkowitsch|_Chem. Revue_, 1901, p. 156. | 296 | 12.5 | 152.8 | Kassler |_Farben-Zeitung_, 1903, p. 359. |___________|_______|____________|____________|_______________________________ _Curcas oil_ is produced in Portugal from the seeds of the "purging nut tree," which is similar to the castor oil plant, and is cultivated in Cape Verde Islands and other Portuguese Colonies. The following data have been observed:-- ______________________________________________________________________________ | | | | | | Saponi- | | | | | fication | Titre,| Iodine No. | Observers.| References. | Equiv- | | | | | alent.[2] |deg.C. | | | |___________|_______|____________|____________|_______________________________ | | | | | | 291.4 | 0.36 | 99.5 | Archbut |_J. S. C. Ind._, 1898, p. 1010. | 290.3 | 4.46 | 98.3 | Lewkowitsch|_Chem. Revue_, 1898, p. 211. | 283.1 | 0.68 | 107.9 | Klein |_Zeits. angew. Chem._, | | | | | 1898, p. 1012. |___________|_______|____________|____________|_______________________________ The titre is quoted by Lewkowitsch as 28.6 deg. C.