[Bonetools] bone details with screw thread

[Heidi Luik]

Dear Katherine,

Thank you very much. Yes, it is possible, they have quite similar 
shape. But I am just wondering why should these bobbins have screw 
thread? I add two pictures from van Vilstern's book (sorry for the 
bad quality), no 122 there is a bobbin, and it does not have screw 
thread. No 120 is a pincushion holder, which has a detail with screw 
thread. But what it is interesting: when they started to cut these 
screw threads into bone (and probably also wooden) artefacts? As I 
understand it is not possible with simple turning lathe but needs 
some special lathe (thread milling cutter?). (I am sorry, maybe I do 
not use right expressions for these things in English)

Heidi


At 14:55 29.03.2011, you wrote:
>Dear Heidi: These are almost certainly bobbins for making lace on a
>pillow, and similar pieces are still in use all over the world (though
>many of them are heirlooms).  Dating them or their use based on
>manufacture would be problematic.
>
>Good luck with this though,
>
>Kate Moore
>
>
>
>Quoting Heidi Luik <heidi.luik at mail.ee>:
>
>>Dear all,
>>
>>My colleague from Tartu asked me about some small bone details with
>>screw thread. These probably come from the 18th-20th century
>>context. I have some similar pieces from Tallinn also. In Tallinn
>>they are from mixed layer, but 18th-19th century looks most likely
>>here too. My colleague would like to know if such objects could have
>>earlier date also, and when screw thread cutter was introduced. I
>>hope maybe some of you has more experience with such things or maybe
>>you can suggest some publications about the topic.
>>(I have found some similar objects in the book: Vilsteren, V. T. van
>>1987. Het Benen Tijdperk. Gebruiksvoorwerpen van been, gewei, hoorn
>>en ivoor 10.000 jaar geleden tot heden. Drents Museum, Assen.)
>>In the attachment are some photos of such objects.
>>
>>Thank you in advance,
>>Heidi
>
>
>
>Zooarchaeology Laboratory
>University of Pennsylvania Museum of Archaeology and Anthropology
>3260 South Street
>Philadelphia, PA 19104 USA
>
>
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