Fig. 6

Linear relationship between the three physical measurements of each of the spiral heteropolar bromalites with respect to the observed water displacement and calculated volumes, n = 300. Comparison of the two regressions shows similar results between the respected volumes. a Linear relationship between the lengths and the observed water displacement volumes (R ² = 0.75). b Linear relationship between the lengths and the calculated volumes (R ² = 0.75). c Linear relationship between the widths and the observed water displacement volumes (R ² = 0.8). d Linear relationship between the widths and the calculated volumes. (R ² = 0.8) e Linear relationship between the thickness and the observed water displacement volumes (R ² = 0.63). f Linear relationship between the thickness and the calculated volumes (R ² = 0.63)