Page:Popular Science Monthly Volume 61.djvu/158

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POPULAR SCIENCE MONTHLY.


Fig. 13. Plumose Quinidine. $\times$ 70 Diameters. Polarized Light.		Fig. 16. Cinchonidine. $\times$ 50 Diameters. Polarized Light.


Fig. 14. Platino-cyanide of Magnesia. $\times$ 70 Diameters. Polarized Light.		Fig. 17. Bichromate of Potash Crystals. $\times$ 70 Diameters. Polarized Light.


Fig. 15. Crystal of C_ACO₃ in India Rubber Plant, $\times$ 120 Diameters.		Fig. 18. Brucine Crystal. $\times$ 70 Diameters. Polarized Light.

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