LIST OF PLATES. VOL. I. 



Plate I. 



Micro-crystalline precipitates from the action of organic acids upon 

 minerals. 



Figs. 1 to 6. Tartaric acid. 



7 to 12. Hydro-calcium tartrate. 



13. Hydro-barium tartrate. 



14 to 16. Hydro-barium oxalate. 



17, 18. Tbe same, differently obtained. 



19, 20. Hydro-strontium oxalate. 



21. Ferrous oxalate. 

 For details, see pages 12 to 16 of text. 



Pi-ate II. 



Prehistoric bronze bells, exhumed in Japan. 



Plate III. 



Variations of form and size in the leaf-scars of Sk/illaria reniformis, 

 Brongt., taken from a single specimen. See pages 43 and 44 of text. 



Plate IV. 



. Variations of form and size in the leaf -scars of Sk/illaria Icevkjata, Brongt. 

 See page 45 of text. 



