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It does not attempt to address the dating of "specialty" or imported bottles made during that time, though much of the information found on this website is pertinent to these items to varying degrees. For this website the distinction between the two categories is related to the varying time frames that different glass making techniques were used for for the two classes of bottles.Click on to view the portion of the Glossary Page that covers these subjects.In addition, this site also assists the user with these questions: 3.What technology, techniques, or processes were used to manufacture the bottle? Where did the bottle come from, i.e., where was it made and/or used? Where can I go for more information on historic bottles?We have tried to define the distinction between these two classes of bottles from the perspective of the intent of and information found on this website.: This website was prepared based primarily on information about bottle manufacturing technologies, processes, and styles specific to the United States. Viewers are encouraged, for personal or classroom use, to download limited copies of posted material. Author reserves the right to update this information as appropriate.Empirical observations indicate that Canadian-made bottles very often followed similar glassmaking technique and process chronologies making much of the information applicable to Canadian made bottles. If using this site for the dating or typing of a known or likely Canadian-made bottle, keep this in mind as the reliability of the information may be reduced.
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This site instead attempts to help the user determine some key facts - approximate age & function - about any given utilitarian* bottle/jar based on observable physical characteristics.
Hundreds of specific historic bottles are used as examples within the pages of this website to illustrate the concepts discussed; with luck you may find the specific bottle you have an interest in discussed though typically you will not.
It also includes "Bottle Dating Worksheets" (pages 51 to 55) by Rebecca Allen and this author to assist in the systematic dating of an historic bottle based on the information in that dating key as well as other information on the website.
In part, this book fulfills this authors long time desire to have a hard copy "field guide" version of this website for use by archaeologists (and others) by having at least the dating portions available in printed form to take to the field.
The author created this website as a BLM employee and continues to update and enhance the site in retirement as a volunteer.