I. _Stearic Series._--The principal acids of this series, together with their melting points and chief sources, are given in the following table:-- ------------------------------------------------------------------------------- Acid. | Formula. | Melting | Found in | | Point, | | | deg.C. | ------------------------------------------------------------------------------- Acetic | CH_{3}COOH | 17 | Macassar oil. ------------------------------------------------------------------------------ Butyric | C_{3}H_{7}COOH | ... | Butter, Macassar oil. ------------------------------------------------------------------------------ Isovaleric | C_{4}H_{9}COOH | ... | Porpoise and dolphin oils. ------------------------------------------------------------------------------ Caproic | C_{5}H_{11}COOH | ... | Butter, cocoa-nut oil. ------------------------------------------------------------------------------ Caprylic | C_{7}H_{15}COOH | 15 | Butter, cocoa-nut oil, | | | Limburg cheese. ------------------------------------------------------------------------------ Capric | C_{9}H_{19}COOH | 30 | Butter, cocoa-nut oil. ------------------------------------------------------------------------------ Lauric | C_{11}H_{23}COOH | 44 | Cocoa-nut oil, palm-kernel oil. ------------------------------------------------------------------------------ Ficocerylic | C_{12}H_{25}COOH | ... | Pisang wax. ------------------------------------------------------------------------------ Myristic | C_{13}H_{27}COOH | 54 | Nutmeg butter, liver fat, | | | cocoa-nut oil, dika fat, | | | croton oil. ------------------------------------------------------------------------------ Palmitic | C_{15}H_{31}COOH | 62.5 | Palm oil, most animal fats. ------------------------------------------------------------------------------ Daturic | C_{16}H_{33}COOH | | Oil of Datura Stramonium. ------------------------------------------------------------------------------ Stearic | C_{17}H_{35}COOH | 69 | Tallow, lard, most solid | | | animal fats. ------------------------------------------------------------------------------ Arachidic | C_{19}H_{39}COOH | 75 | Arachis or earth-nut oil, | | | rape and mustard-seed oils. ------------------------------------------------------------------------------ Behenic | C_{21}H_{43}COOH | ... | Ben oil, black mustard-seed | | | oil, rape oil. ------------------------------------------------------------------------------