. Memoirs and proceedings of the Manchester Literary & Philosophical Society . Fis;- I. Steel Pine-tree Crystals, found in cavity in riser of large steel casting. About ith actual size. Reproduced by kind permission of Messrs. Iiciers Ltd. Manchester Meii/oi?s^ Vol. L V. [No. *ZA). Plate Fig. 2. Longitudinal section of end of steel pine-tree crystal, etched in picric acid and photographed by reflected light. Scale = 2:1.

---

Size: 1595px × 1566px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1800, bookdecade1880, bookidmemoirsproce, bookyear1888