1800s expression for dating
This bottle dating "key" is a relatively simple "first cut" on the dating of a bottle.While running a bottle through the key questions, the user is frequently directed to move to other website pages to explain diagnostic features and concepts as well as to add depth and/or precision to the initial dating estimate.The shift to the fully automated bottle machine from mouth-blown and some semi-automatic methods in the early 20th century is the classic example (Toulouse 1967, 1969a). The same bottle could have been recycled and reused many times for many years before finally being discarded - entire or broken (Busch 1987).
Shape is more indicative of function - i.e., what the bottle was used for or contained - but even that has a myriad of exceptions.
Produced during the era where all bottles were an relatively rare and cherished commodity to be discarded only when broken (i.e., the first third of the 19th century back many centuries prior) and does not otherwise fit the above two categories.
Utilitarian bottles include the majority of the bottles in the following bottle categories or types: soda, mineral water, beer, milk, proprietary medicine, druggist (excluding shop furniture), chemical, foods & sauces, household (including ink, shoe polish, cleaners, personal hygiene related items), common wine containers (excluding decanters), champagne, and most non-decanter spirits/liquor bottles.
In short, there was (and is) nothing to stop a glassmaker from using an obsolete method in the production of a bottle.3.
Some technological changes were expensive and not adopted by glass makers until it became an "adapt or perish" issue and many glass factories just perished.