The omer is an ancient Israelite unit of dry measure used in the era of the Temple in Jerusalem and also known as an isaron. It is used in the Bible as an ancient unit of volume for grains and dry commodities, and the Torah mentions it as being equal to one tenth of an ephah. According to the Jewish Encyclopedia (1906), an ephah was defined as being 72 logs, and the Log was equal to the Sumerian mina, which was itself defined as one sixtieth of a maris; the omer was thus equal to about 12⁄100 of a maris. The maris was defined as being the quantity of water equal in weight to a light royal talent, and was thus equal to about 30.3 L (8.0 US gal), making the omer equal to about 3.64 L (0.96 US gal), or 0.799 imperial gallons. The Jewish Study Bible (2014), however, places the omer at about 2.3 L (0.61 US gal).