Yes, dry mustard can safely be used as a substitute for mustard seed. However, it may make the brine cloudier than mustard seed and may alter the flavor.   1 teaspoon mustard seeds = 1Â½ teaspoons dry mustard.
Humeston is a city in Wayne County, Iowa, United States. The population was 494 in the 2010 census, a decline from 542 in the 2000 census.
Clarkston is a city in Asotin County in the southeastern part of the U.S. state of Washington. It is part of the Lewiston ID-WA Metropolitan Statistical Area. The population was 7,229 in 2010. In 1993, Walla Walla Community College opened a Branch Campus in Clarkston that serves the surrounding area, Lewiston, Idaho. It is still a major draw for the surrounding area.