History resources here... 1  Post history questions in Hancock County genealogy forum. 2  Historic maps of Kentucky. 3  Search the Library of Congress. 4  National Historic Landmark search. 5  Search the National Register for historic properties. 6  Historic maps of KY cities.
I inoculated nutrient agar with bacillus subtilis and it made a dark green colour on agar plates.
Summary: 1  Bacteria, which ferment the contained carbohydrate, form yellowish colonies and the surrounding agar also turns yellow. 2  Bacteria, which do not ferment the contained carbohydrate, form white-purple colonies and the surrounding agar remains purple.