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The longest tube I have measures 54 cm on length. They range right down to 4 cm. To me, what they were used for is much less interesting than how the holes were formed, and how they were made, Remember, in cross section, they are circular, hemicircular, hemicircular with a right angle, triangular, and square. One of the circular ones has four longitudinal score marks, as if a piece of bamboo with four 3 mm microsdiamonds stuck on was used as a pull-through at the end.

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The amazing Hongshan Natural Glass Tubes 3590 drdavidanderson 08-Feb-18 18:08
Re: The amazing Hongshan Natural Glass Tubes 574 MDaines 09-Feb-18 11:28
Re: The amazing Hongshan Natural Glass Tubes 557 drdavidanderson 09-Feb-18 15:24
Re: The amazing Hongshan Natural Glass Tubes 579 michael seabrook 11-Feb-18 21:50
Re: The amazing Hongshan Natural Glass Tubes 553 drdavidanderson 12-Feb-18 08:32
Re: The amazing Hongshan Natural Glass Tubes 541 Apap 13-Feb-18 01:04
Re: The amazing Hongshan Natural Glass Tubes 552 drdavidanderson 13-Feb-18 05:40
Re: The amazing Hongshan Natural Glass Tubes 530 Apap 13-Feb-18 22:38
Re: The amazing Hongshan Natural Glass Tubes 529 Wheeler 13-Feb-18 12:15
Re: The amazing Hongshan Natural Glass Tubes 513 drdavidanderson 13-Feb-18 12:38
Re: The amazing Hongshan Natural Glass Tubes 518 Wheeler 13-Feb-18 13:05
Re: The amazing Hongshan Natural Glass Tubes 531 drdavidanderson 13-Feb-18 14:31
Re: The amazing Hongshan Natural Glass Tubes 522 Wheeler 15-Feb-18 03:22
Tubes and ancient themes. . . 542 Reagent 15-Feb-18 07:02
. . . Forgot to ask . . 535 Reagent 15-Feb-18 07:59
Re: . . . Forgot to ask . . 503 drdavidanderson 15-Feb-18 08:16
Fine lathing technique??? 544 Reagent 15-Feb-18 08:43
Re: Fine lathing technique??? 502 drdavidanderson 15-Feb-18 08:58
Re: The amazing Hongshan Natural Glass Tubes 508 Wheeler 15-Feb-18 11:12
Re: The amazing Hongshan Natural Glass Tubes 514 drdavidanderson 15-Feb-18 11:25
Re: The amazing Hongshan Natural Glass Tubes 517 Wheeler 15-Feb-18 11:44
Re: The amazing Hongshan Natural Glass Tubes 552 jazzmumbles 15-Feb-18 13:01
Re: The amazing Hongshan Natural Glass Tubes 693 Wheeler 19-Feb-18 02:23
Re: The amazing Hongshan Natural Glass Tubes 524 drdavidanderson 19-Feb-18 13:55
Re: The amazing Hongshan Natural Glass Tubes 507 Wheeler 20-Feb-18 20:19
Re: The amazing Hongshan Natural Glass Tubes 604 drdavidanderson 20-Feb-18 18:27
Re: The amazing Hongshan Natural Glass Tubes 583 Wheeler 20-Feb-18 20:24
Re: The amazing Hongshan Natural Glass Tubes 523 drdavidanderson 20-Feb-18 21:21
Re: The amazing Hongshan Natural Glass Tubes 573 Wheeler 20-Feb-18 21:44
Re: The amazing Hongshan Natural Glass Tubes 654 Wheeler 21-Feb-18 11:51
Re: The amazing Hongshan Natural Glass Tubes 765 pgalaxy 26-May-18 11:25


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