In 1864 , Yale chemistry professor Benjamin Silliman , Jr. , a leading expert , examined the oil seepages in Ventura County .
In 1864 , Yale chemistry professor Benjamin Silliman , Jr. , a leading expert , wrote reports that indicated excellent commercial possibilities .
In 1864 , Yale chemistry professor Benjamin Silliman , Jr. , a leading expert , examined the oil seepages in Ventura County , and wrote reports that indicated excellent commercial possibilities .