1800s expression for dating tver russia dating

Acceptance often occurred over a period of many years or decades in some cases.

This technology lag makes some diagnostic characteristics better than others for dating. As a corollary to #1, consider the following quote: "Treat terminal dates with care.

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.

See the Bottle Typing/Diagnostic Shapes page for more information on the subject..

And last, but definitely not least, is the fact that the art and science of glassmaking had a lot of glassmaker/glassblower induced uniqueness in the form of variations, errors, experimentations, and retrogressions.

Utilitarian items makes up the bulk of the bottles produced during the 19th century and first half of the 20th century. Bottles intended to be used once to dispense the contained product without much hope of return, though as noted in #4 above, many types of bottles were commonly reused during the 19th and early 20th centuries; or 2.

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.

A substantial amount of bottle type specific information must be reviewed by a user to increase the probability of dating accuracy.

Additional reference materials outside of this website must often be consulted to narrow down the date of any item as far as is possible and to really get a "feel" for the history of the bottle in question.

We can always have some indication of a starting date for a technique if we can find who first put the idea into practice.

But any technique, once developed, can be used right up to the present - as many collectors know who have been so unfortunate as to rely too heavily on a popular termination date as sure evidence of true antiquity..." (Toulouse 1969b).

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