A Doctor of Philosophy degree (often abbreviated Ph.D. , PhD, D.Phil. , or DPhil) or a Doctorate of Philosophy, from the Latin Doctor Philosophiae, is a type of doctorate awarded by universities in many countries. Doctor of Philosophy degree (often abbreviated Ph.D. , PhD, D.Phil. , or DPhil) or a Doctorate of Philosophy, from the Latin Doctor Philosophiae, is a type of doctorate awarded by universities in many countries.
A furlong is a measure of distance in imperial units and U.S. customary units equal to one-eighth of a mile, equivalent to 660 feet, 220 yards, 40 rods, or 10 chains. Using the international definition of the inch as exactly 25.4 millimetres, one furlong is 201.168 metres.
A chain is a unit of length that measures 66 feet, 22 yards, 100.084 links, or 4 rods (20.1168 m). There are 10 chains in a furlong, and 80 chains in one statute mile. An acre is the area of 10 square chains (that is, an area of one chain by one furlong).