Pontil scars on dating glass dead end dating series book 6
)Reuse, of course, does not change the manufacturing date of the bottle itself, but care must be exercised when using the known date of one or a few bottles to date other items found from the same context.When a likely or known "older" item is found in a known "newer" site it is referred to as deposition lag.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.(The two products were from separate companies which were cross-town [Sacramento, CA.] rivals during the late 19th to early 20th century.
For the archaeologist, the underlying theme of this volume is that more variety and number of consumer goods equals more potential for the understanding of everyday life.
Very similar shaped mustard bottles of French origin with pontil scars were found on the Steamship Bertrand which sank in the Missouri River in April 1865.
Thomas company was founded sometime in the 1860s by Dr. Thomas, a homeopathic physician in Waterbury, VT., where he began his ink business in a nearby barn. These bottles were usually made of colorless or aqua glass; very rarely in other colors.
The Bertrand mustards were a bit unusual in that they had 4 closely stacked rings instead of three spaced ones, though the rings were in the usual positions above and below the open label area’ (Switzer 1974).
Glass bottles are one of the most ubiquitous finds on historic archaeological sites, no matter the locale.
We can always have some indication of a starting date for a technique if we can find who first put the idea into practice.