Obsidian is natural glass from volcanic activity: how sharp can a flake edge of this material be? What about the edge of a flake of chert or flint?

The county could deny african americans the right to attend white schools on the basis of

Read the following passage. the early mill girls were of different ages. some were not over ten years old; a few were in middle life, but the majority were between the ages of sixteen and twenty-five. the very young girls were called "doffers." they "doffed," or took off, the full bobbins from the spinning frames, and replaced them with empty ones. based on the passage, early mill girls were mostly young. were mostly middle aged. were of a variety of ages. were mostly children.

Who proposed the corwin amendment in early march of 1861