1 Most of the county lies between the River Shannon and its major tributary, the River Suck. Athlone on the Shannon is the main point of entry to the county; north of it lies Lough (Lake) Ree and, farther upstream, Loughs Bofin and Boderg. 2  The area is greatly dependent on agriculture, though there is some light industry.
Polis (/ Ë p É l Éª s /; Greek: ÏÏÎ»Î¹Ï pronounced ), plural poleis (/ Ë p É l eÉª z /, ÏÏÎ»ÎµÎ¹Ï), literally means city in Greek. It can also mean a body of citizens. In modern historiography, polis is normally used to indicate the ancient Greek city-states, like Classical Athens and its contemporaries, and thus is often translated as city-state.
A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position. In its simplest form, it consists of an outer case with mirrors at each end set parallel to each other at a 45-degree angle. This form of periscope, with the addition of two simple lenses, served for observation purposes in the trenches during World War I. Military personnel also use periscopes in some gun turrets and in armoured vehicles.