Jones and Cassidy went on to play mother and son on The Partridge Family, which debuted in the fall of 1970. Danny Bonaduce and Susan Dey were also key members of the cast.
Sour crude oil. Sour crude oil is crude oil containing a high amount of the impurity sulfur. It is common to find crude oil containing some impurities. When the total sulfur level in the oil is more than 0.5% the oil is called sour.
Petroleum is considered sour if it contains more than 0.5% sulfur (or 1% by certain definitions), and sweet if it contains less than 0.5% sulfur. The term sweet was originally used to describe the mildly sweet taste and agreeable smell of the low-sulfur sweet crude oil.