What is dating 1840 mean
What is dating 1840 mean - st louis local dating
This flask, classified as GVIII-2 by Mc Kearin & Wilson (1978), was produced in Keene, NH. Though likely fire polished, this bottle still has the pontil scar in evidence.3.
Each section includes information on the processes that produced the scar, alternative naming, and pictured examples.The reasons this occurs are unknown but may just be chance or certain glass making related conditions.These bottles would then appear to have been produced with a snap case tool when in fact they were made with a pontil rod."Specialty" bottles include items in the following categories: barber bottles (many of which are art glass in a bottle shape), upscale perfume & cologne bottles, fire grenades, large display or promotional versions of regular sized bottles, demijohns & carboys, druggist "shop furniture", fancy or figural wine and liquor bottles, liquor decanters and related bar bottles, and reproductions of earlier bottles.(The image to the left is of a late 19th to early 20th century turn-mold barber bottle that has a distinct blowpipe pontil scar with some residual iron, i.e., like a "combination" pontil .) Many specialty bottles were imported from Europe, though that fact may be hard to ascertain. Some early 19th century bottles - particularly decorative bottles intended to be kept indefinitely - were often fire polished as the final step in the production process.Very little iron was left behind though this example does have some pontil rod induced "ridging" that indicates its use.
The point here is that close scrutiny is often necessary to conclude that a pontil rod was not used in the manufacture of what appears to otherwise be a very early bottle.
Supporting the above estimates is one study of medicinal bottles which determined that the peak of transition from pontil rods to snap case tools was during the period from about 1853 to 1856 with utilitarian bottles made during or prior to 1845-1850 having less than a 10% chance of 1.
Certain classes of "specialty" bottles were made using glassmaking techniques from earlier times.
The first use of the snap tool in the United States may have been in the late 1840s (in Europe possibly as early as the 1830s) though its use was definitely evident by at least the early to mid 1850s.
Thus, utilitarian bottles a pontil scar can date as early as the early 1850s (rarely earlier) and pontil scars can be found - though very infrequently - on utilitarian bottles made in the late 1860s and even early 1870s (Toulouse 1968; Newman 1970; Munsey 1970; Watson & Skrill 1971; Innes 1976; Jones 1986; Jones & Sullivan 1989; Mc Dougall 1990; Pastron & Hattori 1990; Van den Bossche 2001; empirical observations).
Click on the following links to move directly to the specific pontil scar discussions on this page: glass tipped pontil scar; blowpipe pontil scar; sand (disk) pontil scar; bare iron pontil scar; "combination" pontil A pontil mark is a variable size and type of scar or roughage left on the base of a bottle by a pontil rod.