Cathy,

I, too, wanted more information about the can guide Matt noted.  I think
I found it in WorldCat.  Here is the page (cleaned up a bit) I copied
from there.

Jane

Jane L. Brown
Anthropology/Sociology
Western Carolina University
Cullowhee, NC 28723-9646
 
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Telephone:  828.227.3696
FAX:  828.227.7061



 
*  Libraries that Own Item: 1 
Title:  A Brief commentary on cans /
Author(s):      Rock, James T.  Corp Author(s):United States.; Forest
Service.  Publication:  [Yreka, Calif. : U.S. Forest Service, Klamath
National Forest,
Year:   1987
Description:    120 leaves : ill., form ; 28 cm.
Language:       English
Abstract:       "This brief overview illustrates some of the recognized
technological and can type changes that have occurred in the U.S. during
the evolution of the tin can ... It is designed only to allow ease of
field identification of a wide variety of these historic artifacts that
are commonly recovered by archaeologists"--Prelim. p.
        SUBJECT(S) 
Descriptor:     Tin cans. 
Tin cans -- United States -- Collectors and collecting. 
Cans. 
Tin containers. 
Containers. 
Archaeology -- Methodology.  Note(s):   Cover title./ "Cultural resource
management."/ Includes bibliographical references (leaves 114-120).
Class Descriptors:      LC: CC79.5.C3 Responsibility:   Jim Rock.