Difference Engine (Civ5)

==Game Info==
Building of the Empires of the Smoky Skies scenario of Civilization V: Gods & Kings.
*+3 
*+4 
==Strategy==
Provides a boost to and . Build one in each city to unlock the Analytical Engine national wonder.
==Civilopedia entry==
Category:Empires of the Smoky Skies (Civ5)/Buildings