Richards and Archibald — Growing Crystals 



Plate III 





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Figure 10. Potassic iodide; 580 diam. ; exposure 0.17 sec. 



Figure 11. Potassic iodide ; 580 diam.; exposure 0.25 sec. 



Figure 12. Potassic iodide ;[ 580 diam. ; exposure 0.17 sec. 



Figure 13. Potassic iodide ; 580 diam. ; exposure 0.17 sec. 



Figure 14. Potassic iodide; 580 diam. ; exposure 0.17 sec. 



Fig re 15. Potassic iodide ; 580 diam. ; exposure 0.17 sec. 



