In a message dated 9/14/2004 9:05:23 AM Eastern Daylight Time,
[log in to unmask] writes:
Jeremy,

Have you looked at the article by Tom Wells "Nail Chronology: The Use of
Technologically Derived Features" that was published in Historical
Archaeology 1998, 32(2):78-99?  His article was also reprinted in the SHA
reader Approaches to Material Culture Research for Historical
Archaeologists that was compiled by David R. Brauner and his students.
This volume is available from the SHA and can be found on their web site.
The bib in the Wells article is particularly useful.

Peace,
George L. Miller
URS Corporation
561 Cedar Lane
Florence, New Jersey 08518
And of course there's the Wells and Edwards book

Edwards,Jay and Wells, T
1993
Historic Louisiana Nails: Aids to the Dating of Old Buildings
Geoscience publications, Department of Geography & Anthropology, LSU Baton
Rouge, La.