Transactions . Combination of Two Conical Poles, ofSemi-angle ° and 45° Respec-tively. Pole-distance, 2 in. Fig. 9. Fig. 10 Combination of a Conical Pole of Semi-angle ° and a Half-inch SphericalPole. Pole-distance, 2 in.

---

Size: 1375px × 1816px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries