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Date: | Wed, 10 Mar 2004 17:33:11 -0500 |
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I second Smoke's observation - I have never heard of excluding stems
connected to bowls from a pipe date.
May I add that the shape of the curve ascribed by the histogram is as
important as the major mode.
Silas Hurry
Historic St. Mary's City
Maryland
At 10:49 AM 3/10/04 -0600, you wrote:
>Howdy, Julie! First of all, I am assuming that you are familiar with the
>narrow confines with which stem bore dating can be used. I have never
>heard of not using the stem bore diameter measurements if the stem fragment
>is close to the bowl so I don't know when that "started". Also, the
>distance from the rear of the bowl from which the stem bore diamter
>measurements "could" be taken would be highly arbirtary. However, I did
>conduct uncontrolled/unofficial experiments in graduate school with
>breaking pipe stems to see if there were variations in stem bore diameter
>within a single pipe.
>
>I took 6 white ball clay pipes with stems from 7 to 12 inches long and
>outlined them on a sheet of paper. If I recall correctly, 3 were
>Goedewagen, 2 were English (probably by John Pollock) and one was an
>american reproduction (probably from Williamsburg) and I wrote down the
>maker by each outline. I then broke the stems into segments about 1 1/2
>inches long and placed them back on the outlines and maked the break on the
>outline. I used my short step guage to measure since the longer one
>sometimes does not go in all the way on curved stems. I then measured each
>break and wrote it down at the drawn break line.
>
>What I remember is that 2 of the six pipes showed as much as 1/64 inch
>variation above or below the norm (one had 2 spots of 1/64 above the norm
>and one had one each of 1/64 above and below the norm) and four pipes had
>the same bore diamter all the way through. The stem bores were made by
>pushing a wire through the stem. This can cause variations by 1)
>displacing clay as the wire is inserted and 2) pinching of the stem while
>removing the wire. I think that the displaced clay during wire insertion
>may be increased if the wire is not pointed enough or the clay has been
>allowed to become to stiff (or less elastic).
>
>I have searched high and low for that piece of paper for years. However,
>during the experiment in the grad student bull pen, one of our collegues
>brought in a 1 quart Mason jar of a clear liquid refreshment he received as
>a "Care Package" from relatives in the Carolinas. The rest of the evening
>is a blur.
>
>:-)
>
>Smoke.
>
>
>Smoke (Michael A.) Pfeiffer, RPA
>Ozark-St. Francis National Forests
>605 West Main Street
>Russellville, Arkansas 72801
>(479) 968-2354 Ext. 233
>e-mail: [log in to unmask]
>
>It is easier to get forgiveness than permission.
>
>
>
>
> "Brodeur, Julie"
> <JBrodeur@MPTN-N To: [log in to unmask]
> SN.GOV> cc:
> Sent by: Subject: pipestem bore
> diameters
> HISTORICAL
> ARCHAEOLOGY
> <[log in to unmask]
> u>
>
>
> 03/10/2004 09:58
> AM
> Please respond
> to HISTORICAL
> ARCHAEOLOGY
>
>
>
>
>
>
>-----Original Message-----
>From: Brodeur, Julie
>Sent: Wednesday, March 10, 2004 8:58 AM
>To: [log in to unmask]
>Subject <mailto:[log in to unmask]> : pipestem bore diameters
>
>While reading Deetz and Deetz The Times of Their Lives I paused at the
>passages describing how J.C. Harrington developed his method for measuring
>pipe stem bore diameters. Deetz and Deetz recount that Harrington first
>made
>his observations on bowls that had a portion of the stem visible. In our
>labs it has been the tradition that we not use the bore diameters at this
>juncture so close to the bowl; the rational was that it will give us an
>inaccurate measurement. No one here can remember exactly who, when or why
>this convention began in our labs and I've not been able to come up with
>any
>documentation for the practice. Therefore I am turning to the list for
>input. Is there a basis in the 50 year history of the development and
>refinement of Harrington's method for not using the bore diameters close to
>the bowl? Or are we following an erroneous convention?
>
>Julie L Hartman-Brodeur
>Staff Archaeologist
>Mashantucket Pequot Museum and Research Center
>(860) 396-6951 [log in to unmask] <mailto:[log in to unmask]>
>
>
>
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