Hello to the list:)

Anyone know when safety pins in their simple wire form patented in 1849 
(Hunt) were changed by the addition of the sheet metal guards around the 
heads?  I'm archaeologically relocating a slave/Reconstruction cemetery in 
central Tenn. and most of the burials contain safety pins down what would be 
the back of the interments.  Skeletal preservation has been slim:(

Dan Allen
Cumberland Research Group, Inc.
and GRA; the Center for Historic Preservation @ MTSU