The press cake is of limited value for livestock purposes. It is especially common in Africa and in France. It is higher boiling than most oils and imparts a pleasant taste to the food. At least 3500 B.C. in Crete. Olive oil was also used as a cleanser, for annointing, as a lamp oil, for medicine, and as a food stuff.
Olive oil comes from both the fruit pulp and from the seed.
There are many different grades of olive oil. The seeds are highly toxic but the compounds responsible are not soluble in the oil. See the diagram on page 342. Castor bean probably grew in both Asia and Africa when it was domesticated. Seeds have been found in Egyptian tombs at least 6000 years old.