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The Pointed Bottom Bottle: An Ancient Instrument for Monitoring Earth-air

Received: 31 August 2023    Accepted: 18 September 2023    Published: 27 September 2023
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Abstract

The pointed bottom bottle (PBB) is a specific type of pottery with a pointed bottom widely produced in the Yangshao culture (7000–5000 BP) of prehistoric China. Since its discovery, opinions vary regarding its usage and purpose of design. Monitoring the air pressure enclosed in the PBB, this paper potentially reveals its usage and a possible reason for such a unique shape: it is an instrument of monitoring the earth-air by the general public as a practice of hou-qi. Ancient Chinese buried the PBB under the earthen floor in a sheltered room. Due to a moderate size of the room, daily temperature fluctuation of the earthen floor was limited, and the height of PBB was consistent with the depth of the earthen layer with a daily temperature change. However, using PBB to define solar terms on a yearly basis could have been interfered by the daily temperature variation of soil. Ancient people took advantage of the large daily temperature variation in the top layer of the soil and the small fluctuations with a hysteresis of ~12 hours in the lower layer, so that the temperature changes in upper and lower levels of soil exist in different directions. This counterbalances the interference of daily temperature response on pressure through spatial and temporal differences of temperature fluctuations in upper and lower parts inside PBB. The PBB can further eliminate the influence of daily fluctuation peaks of the atmospheric pressure, making changes in air pressure inside the bottle completely following the yearly temperature, functioning as farming seasonal guidance.

Published in International Journal of Archaeology (Volume 11, Issue 2)
DOI 10.11648/j.ija.20231102.12
Page(s) 22-36
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Pointed Bottom Bottle, Earth-Air, Yangshao Culture, Hou-Qi

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  • APA Style

    Hongshou Li, Fei Li, Shunren Wang. (2023). The Pointed Bottom Bottle: An Ancient Instrument for Monitoring Earth-air. International Journal of Archaeology, 11(2), 22-36. https://doi.org/10.11648/j.ija.20231102.12

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    ACS Style

    Hongshou Li; Fei Li; Shunren Wang. The Pointed Bottom Bottle: An Ancient Instrument for Monitoring Earth-air. Int. J. Archaeol. 2023, 11(2), 22-36. doi: 10.11648/j.ija.20231102.12

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    AMA Style

    Hongshou Li, Fei Li, Shunren Wang. The Pointed Bottom Bottle: An Ancient Instrument for Monitoring Earth-air. Int J Archaeol. 2023;11(2):22-36. doi: 10.11648/j.ija.20231102.12

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  • @article{10.11648/j.ija.20231102.12,
      author = {Hongshou Li and Fei Li and Shunren Wang},
      title = {The Pointed Bottom Bottle: An Ancient Instrument for Monitoring Earth-air},
      journal = {International Journal of Archaeology},
      volume = {11},
      number = {2},
      pages = {22-36},
      doi = {10.11648/j.ija.20231102.12},
      url = {https://doi.org/10.11648/j.ija.20231102.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ija.20231102.12},
      abstract = {The pointed bottom bottle (PBB) is a specific type of pottery with a pointed bottom widely produced in the Yangshao culture (7000–5000 BP) of prehistoric China. Since its discovery, opinions vary regarding its usage and purpose of design. Monitoring the air pressure enclosed in the PBB, this paper potentially reveals its usage and a possible reason for such a unique shape: it is an instrument of monitoring the earth-air by the general public as a practice of hou-qi. Ancient Chinese buried the PBB under the earthen floor in a sheltered room. Due to a moderate size of the room, daily temperature fluctuation of the earthen floor was limited, and the height of PBB was consistent with the depth of the earthen layer with a daily temperature change. However, using PBB to define solar terms on a yearly basis could have been interfered by the daily temperature variation of soil. Ancient people took advantage of the large daily temperature variation in the top layer of the soil and the small fluctuations with a hysteresis of ~12 hours in the lower layer, so that the temperature changes in upper and lower levels of soil exist in different directions. This counterbalances the interference of daily temperature response on pressure through spatial and temporal differences of temperature fluctuations in upper and lower parts inside PBB. The PBB can further eliminate the influence of daily fluctuation peaks of the atmospheric pressure, making changes in air pressure inside the bottle completely following the yearly temperature, functioning as farming seasonal guidance.},
     year = {2023}
    }
    

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    AU  - Hongshou Li
    AU  - Fei Li
    AU  - Shunren Wang
    Y1  - 2023/09/27
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    DO  - 10.11648/j.ija.20231102.12
    T2  - International Journal of Archaeology
    JF  - International Journal of Archaeology
    JO  - International Journal of Archaeology
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    PB  - Science Publishing Group
    SN  - 2330-7595
    UR  - https://doi.org/10.11648/j.ija.20231102.12
    AB  - The pointed bottom bottle (PBB) is a specific type of pottery with a pointed bottom widely produced in the Yangshao culture (7000–5000 BP) of prehistoric China. Since its discovery, opinions vary regarding its usage and purpose of design. Monitoring the air pressure enclosed in the PBB, this paper potentially reveals its usage and a possible reason for such a unique shape: it is an instrument of monitoring the earth-air by the general public as a practice of hou-qi. Ancient Chinese buried the PBB under the earthen floor in a sheltered room. Due to a moderate size of the room, daily temperature fluctuation of the earthen floor was limited, and the height of PBB was consistent with the depth of the earthen layer with a daily temperature change. However, using PBB to define solar terms on a yearly basis could have been interfered by the daily temperature variation of soil. Ancient people took advantage of the large daily temperature variation in the top layer of the soil and the small fluctuations with a hysteresis of ~12 hours in the lower layer, so that the temperature changes in upper and lower levels of soil exist in different directions. This counterbalances the interference of daily temperature response on pressure through spatial and temporal differences of temperature fluctuations in upper and lower parts inside PBB. The PBB can further eliminate the influence of daily fluctuation peaks of the atmospheric pressure, making changes in air pressure inside the bottle completely following the yearly temperature, functioning as farming seasonal guidance.
    VL  - 11
    IS  - 2
    ER  - 

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Author Information
  • The Dunhuang Grottoes Monitoring Center of Dunhuang Academy, Dunhuang, China

  • The Dunhuang Grottoes Monitoring Center of Dunhuang Academy, Dunhuang, China

  • The Dunhuang Grottoes Monitoring Center of Dunhuang Academy, Dunhuang, China

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