Departmental Bulletin Paper 種実圧痕の定量分析に関する予察 : 補填材重量の検討
A preliminary study of the quantitative analysis of plant seed impressions in pottery : An investigation of weight of filling materials

守屋, 亮

30pp.81 - 88 , 2016-03-29 , 東京大学大学院人文社会系研究科・文学部考古学研究室 , The Department of Archaeology Faculty of Letters, The University of Tokyo
The purpose of this study is to create a numerical formula for calculating weight of a pottery except for a filling material, and a following formula was created. W₁ = W₃ρ₁(1-p) / ρ₁-p(ρ₁-ρ₂) W₁ : weight of pottery except for a filling material W₂ : weight of a filling material W₃ : weight of pottery and a filling material p : proportion of a filling material (0<p<1) ρ₁ : density of pottery ρ₂ : density of a filling material (plaster) In addition, density of potteries( ρ₁) and a filling material( ρ₂) was calculated. The result was as follows. ρ₁=1.85 1.00 < ρ₂<1.80 And these numerical values were substituted ρ₁(1.85) and ρ₂(1.10, 1.30, 1.50 and 1.70) for a above formula. For reference, a number of plant seeds impressions per 10kg of potteries from one site were calculated to compare with another site by using this formula. As a result, the difference between the numerical values of filling materials(1.00 < ρ₂<1.80) had little influence on comparison between them.

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