several Iowa place names, including the counties of Buena Vista, Palo Alto and Cerro Gordo. As is traditional in official symbols, weapons are held in the soldier's left hand, and items of peace and freedom in the right. Liberty Cap. A "liberty cap", also called a Phrygian cap, is a brimless hat resembling a tall beret that is an ancient Greek symbol of freedom. However, the soldier on the seal typically wears a wide-brimmed hat that resembles a Civil War-era Cavalry hat. Most versions of the seal put the liberty cap on top of the flag staff, in imitation of a Liberty pole. Wheat. Early settlers in the 1840s primarily planted wheat, and it was not until the introduction of the railroad in the 1850s and 1860s that corn became the primary crop grown in Iowa. Lead. Lead mining in the Dubuque region was an early economic force; no lead is mined in Iowa today. A "pig" is a large slab of lead shaped in a furnace mold, with four corners protruding slightly to facilitate handling; thought to resemble the animal pig. Steamer Iowa. The Steamboat Iowa was revered as one of the largest and fastest boats on the Mississippi; it set the speed record from Galena, Illinois to St. Louis in 1843, making the trip in 44 hours, a record that held until 1849. The Mississippi was the primary route of transportation in Iowa in the 1840s, and most large Iowa towns were on or near the Mississippi. Eagle. The federal eagle was used in the earlier Seal of the Iowa Territory, and this symbol holding a banner with the motto of Iowa on it was incorporated into the flag of Iowa. "Plow in his rear" controversy Concerned about portraying members of the Iowa National Guard in a poor light, in 2010 Rep. Ray Zirkelbach, a state legislator, recommended changing the text "the citizen soldier, with a plow in his rear" to "the citizen soldier, standing in front of a plow” because "in his rear" is considered a malapropism. His proposal was not considered in 2010 because of time constraints. Iowa territorial seal The state seal supplanted the Iowa Territory seal (1838–1846), which consisted of a Federal eagle holding an arrow in its mouth and a bow in its talon. "The Seal of Iowa contains the following simple device: An Eagle In the attitude of flight grasping in its